Kv to kt So Kt/V is related to the URR but Kt/V is better because it accounts for things like urea generation during dialysis. It is Jan 3, 2012 · The discussion revolves around finding the velocity of an object in free fall with air resistance, described by the equation a = g - kv, where g is gravitational acceleration, k is a constant, and v is velocity. Kt can be calculated from Kv, as it's 1/Kv (using consistent units). kilovolts a voltage measurement unit. Nov 3, 2006 · Discussion Kv, Kt, and efficiency Electric Motor Design and Construction Hobby King sells a product called the "K1 KV/RPM Meter" which was designed to measure the Kv of brushless motors. Measuring key Official site for KT Tape products. Should I be using peak or RMS voltage/current in calculating motor performance? kt * kv = 1352 (what units?) - RC Groups Aircraft - General Electric Power Systems kt * kv = 1352 (what units?) Page 1 of 3 1 2 3 Next Thread Tools Apr 15, 2020 · The motor sizing will stay the same because winding selection changes Kt and Ke equally. As the K factor increases so does the resistance to flow. Kv can be measured by spinning the motor at a known RPM and measuring the RMS voltage between any two windings. exe file. 04775 Nm per amp. Loss Factor, K: The loss factor is a constant directly proportional to the pressure drop across the component. The positive direction of all vector quantities is downward. Back EMF (Ke or Kv) is proportional to Kt. Easily convert Kilovolt (kv) to Megavolt (mv) with our accurate voltage conversion tool. multiply the product (NM*rad/sec) by 1352. Invert this to get a torque constant of 0. Yes, KV and KT motor constants describe torque but do it in relation to the current. So doubling Kt will also double Ke. Jun 17, 2022 · The motor sizing will stay the same because winding selection changes Kt and Ke equally. This is true both for peak and RMS categories. Kv is in units of RPM/Volt. Kt has units of Newton-meters per Amp. Interestingly enough, the kt value is simply the inverse of the kv value of the brushless motor. Use the full power of this unit converter to convert keV With this calculator, it is possible to enter the value to be converted together with the original measurement unit; for example, '655 kT (also written as kBT) is the product of the Boltzmann constant, k (or kB), and the temperature, T. This is what you want to know. . Delta and Wye configurations are different types of wind terminations within a brushless motor. com helps in the conversion of different units of measurement like kV/mm to kV/in through multiplicative conversion factors. 2 per hemodialysis session when three sessions per week are used in patients with no residual renal function based on cross sectional studies were increasing mortality has been associated with Kt/Vs of <1. Discover how a motor’s voltage (Ke), torque (Kt), and speed constant (Kv) relate. Feb 9, 2019 · In a previous post, the velocity constant (Kv) and torque constant (Kt) was estimated for a number of different 'hobbyist level' BLDC (PMSM) out-runner motors. Convert kilovolts to volts (kV to V) with the voltage conversion calculator, and learn the kilovolt to volt formula. The flow factor is the metric form and a simple conversion factor shown below can be used. Sep 27, 2021 · As you note yourself, Kv = 1/Kt. Link to measuring Kv in The Kv that tags brushless motors, and less commonly the brushed motors, is haunted by fairy tails and incorrect information. Kt × Kv = 1352 Kt = 1352 ÷ Kv . A higher Kv value means the motor will achieve a higher speed for a given voltage, but typically results in lower torque. So 1 kilovolt = 10 3 volts. The other equation differs only in a constant factor : therefore it is equally accurate, if you can figure out which system of units it is in. The term Kt/V (pronounced K T over V) integrates 3 critical factors:K (Clearance): The clearance of urea (K) Jun 23, 2015 · Dear Sir, From user manual (spruhj1f, Page 396), the rotor flux (which is also equal to the back-EMF constant (Ke) in SI units). However the no-load rpm at nominal voltage is usually provided, from which Kv can be derived. Jan 31, 2024 · This article dives into how KT Tape can be a game-changer for those suffering from knee pain. The formula provided bridges the gap between these electrical parameters and mechanical output, making it essential for optimizing motor performance in various applications. What Is Kt/V? Oct 14, 2023 · Learn what KT tape is, what research says about its benefits for the shoulder, and the correct way to apply KT tape to relieve shoulder pain. This text tries to clarify the meaning of this rating, and brings some general information about electric motors. In this post, I will be using FEMM to model one of these motors as accurately as possible. 馬達尺寸常數KM 、 反電動勢 常數Kv 及 轉矩常數KT 都是常用來描述 馬達 特性的數值。. The Kt/V formula in HEMO was normalized for volume (V). Oct 6, 2018 · As expected, the Ke = (30/pi/Kv). Apr 20, 2010 · OK, some of you may already know the answer to these questions, in which case this post will tell you more about me than about motors. The first article above addressed the concern that in a subgroup analysis of the HEMO study, women had a lower death rate, but not men when dialyzed to a higher Kt/V. The issue I see is that you are assuming that all of the motor ratings are valid across the May 25, 2016 · These two constants Kt and Kv are not related, knowing torque constant won't help you to calulate the generated voltage. Kt/V is a widely used parameter for quantifying the adequacy of dialysis treatment in patients with end-stage renal disease (ESRD). Input two values to calculate the third and optimize efficiency. After downloading all of the files, merge them by running the . Megavolt is a metric unit of electric potential. Here we compare specificly Kt and Kv. Kv is the inverse of Kt. In SI units, the motor constant is expressed in newton metres per square root watt ( ): K M = τ P {\displaystyle K_ {\text {M}}= {\frac {\tau } {\sqrt {P}}}} where τ {\displaystyle \scriptstyle \tau } is the motor torque (SI unit: newton–metre) P {\displaystyle \scriptstyle P} is the resistive power loss (SI unit: watt) The motor Jul 12, 2025 · Motor Constants KV, Kt, Ke, Km explained July 12, 2025 If you've spent any time working with BLDC or PMSM motors, you've probably encountered terms like KV, Kt, Ke, and Km. For ounce-inch torque units, Kt × Kv = 1352. Instant free online tool for kiloton (metric) to ton (metric) conversion or vice versa. However, does this reveal anything about power? Nov 11, 2011 · The torque constant, Kt, of a motor is a very useful parameter for sizing and controlling motors showing a linear speed / torque relationship. Use Calculator to perform conversions from kilovolts to other voltage units and for comparison refer to kilovolts conversion chart. 4 to get the equivalent in (inch ounces*rpm). 2 and data from the HEMO trial. I have come up with what I believe is a very accurate model of the relationship of Kv and Kt based on the winding pattern Sep 9, 2021 · The kv of a motor doesn't change the continuous power rating of a motor. When a manufacturer states the maximum continuous power of a motor, they are indicating the maximum power a motor can output at given The most convenient set for conversion from Kt to Kv and back is to have Kv in volts per radian per second and Kt in Newton-meters per amp. Kv is the rpm per Volt. unitsconverters. Oct 1, 2025 · Enter the total kilovolts (kV), the current (amps), and the rotational speed (RPM) into the calculator to determine the Torque from kV. Suc Jan 23, 2025 · Particle 1 is subjected to an acceleration a = -kv, particle 2 is subjected to a = -kt, and particle 3 is subjected to a = -ks. Learn techniques for inner, outer and full knee, plus reduce pain from injury. KV Rating Conversion of units of measurement from physics and maths, e. Online calculator to convert kilovolts to millivolts (kV to mV) with formulas, examples, and tables. Feb 9, 2021 · A Lower (vs higher) Kv Motor Produces More Torque It is a common misconception that a lower Kv motor automatically produces more torque then a higher Kv motor in the same size class. For product users only. The kiloton (metric) [kt] to ton (metric) [t] conversion table and conversion steps are also listed. Aug 5, 2023 · A kV to mV conversion calculator is a digital tool used to convert the electrical potential from kilovolts (kV) to millivolts (mV). 4 Power Calculations Mechanical Power = Torque × Angular Velocity Electrical Power = Voltage × Current Efficiency = Mechanical Power / Electrical Power Pro Tip: These formulas assume ideal conditions. When talking about the Kv of the motor, we must mention the connection between Kv and the torque- depend on each other. These constants are often thrown around in datasheets, forums, and technical docs, but what do they actually mean—and how do you use them? KV and Ke constant Once you have the Voltage Constant (Kv) you can calculate the Torque Constant (Kt) by taking advantage of a counterintuitive relationship between Kv and Kt. 001 MV How many Megavolts in 59 kilovolts: If φ kV = then φ MV = 0. It might sound like a complicated formula, but understanding what Kt/V means—and why it matters—can help you stay informed and engaged in your treatment. Apr 1, 2025 · Motors: KT & KV April 1, 2025 · 4 min read Carlos Gonzalez Chief Hacker @ CGG Labs Jun 3, 2025 · Understanding Kt/V: What Dialysis Patients Should Know If you’re on dialysis, chances are you’ve heard your care team talk about something called Kt/V. 1 for all three particles (note that the units of k vary from case to case). Generally, motor constants result from the construction details of a given motor. The Kt and Kv of a motor are each exactly proportional to the number of turns around each stator tooth. How to derive Kt from motor Kv. In the process, you will see how to use FEMM to model such a motor and how accurately its results compare to the real thing. What we do know is that the Kv constant of the motor is directly related to the torque constant of the motor, Kt. Remember that Kt is a measure of Torque per amp. I'm talking about Permanent Magnet Brushless DC motors, but the principle applies to other types. Note that Pin=V*I with Pin in watts, V in volts, and I in amps, and Pout=omega * tau with omega being speed in radians per second, tau being torque in Newton-meters, and Pout still in watts. The thing you have to keep in mind is if you have a low urea level in the first place, not much urea is going to be removed in the first place, so even though it's a ratio, that ratio is going to be smaller. com helps in the conversion of different units of measurement like kV/m to kV/mm through multiplicative conversion factors. Oct 3, 2024 · Calculating the torque produced by an electric motor from its kV rating involves understanding how voltage, current, and speed interact in an electric power system. Apr 5, 2017 · kT = torque constant (Nm/A) And Where: ω = angular velocity (rad/s) VE = back EMF voltage (V) kE = back EMF constant (V-s/rad) The torque constant, k T, is specific to motor’s design, including its magnetic strength, number of wire turns, and armature length. Also, Mtr (s)=3/4*P*rotor flux; ??? since it is the transfer function between q-axis current and motor torque is: Is that Kt, that is Kt=3/4*p*rotor flux, since rotor flux is Ke in SI units, it means Kt = 3/4*P*Ke ??? Is my understanding right ? However, from another Nov 7, 2025 · PLC/HMI Software Installer This page allows users to download the latest installer for the commercial software. I strongly suspect that this meter uses the "Drill Press" formula described previously. The Kv rating designates the RPM a motor will spin at full throttle when unloaded given an input voltage. In medicine, Kt/V is a number used to quantify hemodialysis and peritoneal dialysis treatment adequacy. Jul 21, 2025 · KV in brushless motors means RPM per volt applied. This article describes the relationship between the different motor constants (e. Calculator: Convert Kiloelectronvolt (keV) To achieve the desired result as quickly as possible, it is best to enter the value to be converted as text, for example '25 keV to aJ' or simply '76 keV '. 001 × φ kV How many Megavolts in a kilovolt: If φ kV = 1 then φ MV = 0. It determines motor speed and torque, helping you select the right motor for your project needs. 059 MV Note: Kilovolt is a metric unit of electric potential. Sep 17, 2012 · The voltage constant is Kv. Apr 26, 2017 · Or alternatively Km = Kt / R^0. The torque- Kt is (to simplify it) a constant inverse to the Kv. (b) What is the terminal speed of the object? (c Dec 25, 2018 · How to estimate the torque of a BLDC (PMSM) electric motor using only its Kv and current draw Motor constants are needed to calculate permanent magnet DC (PMDC) or brushless DC (BLDC or EC) motor or gearmotor specifications and ratings Nov 7, 2025 · PLC/HMI Software Installer This page allows users to download the latest installer for the commercial software. The higher Kv, the lower Kt is. speed and torque constant). Km is equal to Kt /√Rt. As you calculated, at peak power, the motor will draw 41. Aug 14, 2023 · Where Kt is measured in Newton-meters per ampere (N·m/A) 3. The flow coefficient - Cv - or the flow factor - Kv - are commonly used to specify capacities of control valves. Common voltage conversions KV to statvolt KV to teravolt KV to exavolt KV to abvolt KV to petavolt KV to nanovolt KV to hectovolt KV to gigavolt KV to decavolt KV to femtovolt Definition: Kilovolt The SI prefix "kilo" represents a factor of 10 3, or in exponential notation, 1E3. Which brings me to my second point of confusion. RPM= Kv * Voltage Kt - Torque Constant The more torque a motor needs to produce, the more current it will draw. Apr 15, 2018 · Also the linked motor specifies Kv for both Y and Delta, reassuringly close to sqrt (3) apart. Participants emphasize the need to set up a differential equation and suggest using integration techniques to solve it, noting that the solution provided in the textbook is v = (g/k How to convert kilovolts to Megavolts [kV to MV]: φ MV = 0. Jan 17, 2017 · But there's more. All three particles start at the origin s = 0 with an initial velocity v_ {0} v0 = 10 m/s at time t = 0 and the magnitude of k is 0. The current, torque, and Kv are closely 馬達尺寸常數KM、反電動勢常數Kv及轉矩常數KT都是常用來描述馬達特性的數值。. Kinesiology tape knee support and stability from industry leading KT Tape. 4. Nov 9, 2020 · Kt = 1/Kv. Our conversions provide a quick and easy way to convert between Power or Electricity units. Plot the position, velocity, and acceleration versus time . 7 amps. To estimate the RPM of a motor, simply multiply the Kv value by the battery voltage. 4 is a conversion factor and is not a magic number that only applies to electric motors. (a) Draw a free body diagram showing the forces acting on the object. The stone in the example above has the changing amounts of potential and kinetic energy throughout its fall, but the sum of the two is constant, because kinetic energy converts to potential energy, and vice versa. As long as you are to maintain SI units in your calculation, you will calculate the correct kt value. Mar 16, 2025 · Explanation Kv and Speed-Torque Relationship: The Kv value (voltage constant) of a BLDC motor directly affects its speed-torque characteristics. K – dialyzer clearance of urea t – dialysis time V – volume of distribution of urea, approximately equal to patient's total body water In the context of hemodialysis, Kt/V is a pseudo-dimensionless number; it is dependent on the pre- and post-dialysis concentration (see below). The Torque Constant: Kt Motor torque also has a constant abbreviated 'Kt' that has a relationship to the voltage constant Kv. Can't the Kt and Km be derived from the motor ID variables flux_VpHz and Rs_ohm? Dec 18, 2022 · Motor Kv tells us about the performance as it relates to an unloaded RPM output of the motor. (Also, when women were dialyzed at a lower Kt/V they had a higher mortality rate). The motor constant (Km) indicates a motor’s efficiency in converting electrical to mechanical power, vital for project application, while the torque constant (Kt) correlates current to produced torque. Or at least, does not depend directly on KV. Participants clarify that the acceleration of the object is related to the total force, and they derive the velocity function using separation Apr 28, 2015 · I have been slowly improving upon the excel spreadsheet I developed for the MXUS Direct Drive Hub Motors, including the XF40-45H 3000W motors and the XF40 27mm 1000W motors. (As it must be : Torque * Speed = power = Voltage * Current). Real-world performance will differ due to factors like motor efficiency, temperature, and load characteristics. Nov 7, 2025 · Latest Updates Due to its large size, the software has been split into separate files. 001 × = 0. 1352. As a seasoned fitness expert who has explored various pain relief methods, I'll guide you through the benefits, application techniques, and key considerations of KT Tape. 5 Kt = Torque constant, Nm / Ia (Newton-Meter per Armature current) R = Motor winding resistance, Ohms Torque constant, defined by motor torque divided by armature current. Kv will help us calculate the current the motor needs to reach a certain torque level. Brushless motor Kv rating explained, including its importance and how it impacts drone performance, helping enthusiasts make informed decisions. The net force acting on the object is expressed as Fnet = mg - KV, leading to a first-order linear differential equation. 001 × 1 = 0. Jan 13, 2023 · Discussion thrust calculation with battery and KV Electric Power Systems Comparing flow coefficients Cv to flow factors Kv. Jan 2, 2025 · How to calculate the torque of an electric motor using the torque equation, Torque = Kt * Current. Introduction to Motor Constants for Fractional Horsepower Gearmotors Motor constants are needed to calculate permanent magnet DC (PMDC) or brushless DC (BLDC) motor specifications and ratings, or to match the motor properly to an amplifier. Apr 18, 2022 · T =kT * I In this equation, T is torque, Kt is the torque constant, and I is current. But, women and men have different volume of distribution and body surface area Dialysis Efficiency Calculator or Kt/V calculator is an interactive tool that indicates how well dialysis is working for you and checks if enough water and waste products are cleared from your blood. motor KV vs torque - how KV changes torque and how it correlates with another motor constant: KT stator and rotor - what is what and it's named like that Feb 14, 2025 · Discover 11 drone motor parameters, including KV rating, efficiency, and thrust-to-power ratio, to optimize your drone’s performance. Ie, Kv tells you how fast the motor Oct 7, 2016 · Motors designed for other uses often don't have a Kv rating because it is not considered so important. Historical Background The concept of "kV" in electric Jul 8, 2021 · So, for line to line, the following relations hold between the BEMF constant Ke and the motor speed constant Kv: For the torque constant Kt, the relation to Ke/Kv looks like this: Now if we consider a star connected PMSM motor, there is a factor in the relation between the torque constant and Kv: Now lets have a look at a real motor datasheet: kV to Torque Calculator: Enter the values of product of motor kV rating, kV (RPM/V), current, I (A) and rotational speed, RPM to determine the value of kV to torque, T kV (N. Kt = T / Ia Now the question. Easily convert kilograms to kilotons (metric) with this online mass converter for accurate and quick unit conversions. It is a dimensionless number that reflects the efficiency of dialysis in clearing urea from the blood. It experiences a force of air resistance F = -kv, where k is a positive constant. Kt is the torque constant. 200 Kv (RPM per volt) = ~21 rad/sec per volt. Newton's 2nd law, drag Problem: An object of mass m is launched from a stationary helicopter towards the Earth with the speed v 0. Feb 22, 2025 · Kv serves as a crucial element in back EMF modeling alongside the motor’s resistive and inductive properties. The relationship of Kt is the inverse of Kv. So if you know the motor constant (Km) and the motor resistance (Rt) you can easily derive the torque constant (Kt). With Kt expressed in units of oz-in/amp: Kt · Kv = 1352 Our Kt/V calculator allows you to painlessly estimate the efficacy and adequacy of a hemodialysis. m). Woo-hoo! Coolness. The slope of the motor’s torque-current curve is determined by the torque constant. In the above windings, the 6T winding has the highest Kt (Torque constant), and in fact, a 6T winding has twice the Kt, and one half the Kv of the 3T winding. – user16324 Feb 28, 2020 at 12:14 Add a comment Nov 6, 2025 · Motor KV (often written as KV) is the number of rotations per minute (RPM) the motor produces per volt applied: Motor constant Kt, on the other hand, defines how much torque the motor generates per ampere of current: When using consistent SI units, these two are inversely proportional: These equations only work if KV is in RPM/V and Kt is in Nm/A! Nov 13, 2025 · Does the KX modifier need to be on the claim with the KT or KV modifiers? If a patient resides in a CBA and receives an OTS knee brace from a contract supplier in their CBA, does the contract supplier need to apply the KT modifier to the claim? How are suppliers reimbursed for OTS back and knee braces when the KT modifier is affixed to the claim? Aug 1, 2012 · So for a practical definition, the torque constant Kt specifies how many Nm of torque you'll get from the motor at a certain current? Is a bigger Kt always better? I am more confused about the ba Convert kiloelectronvolts (keV) to another unit of energy such as joules, kilojoules, or megajoules, and see the conversion formulas. There is just one way, spin the motor and measure voltage and speed, make a table and write a linear function. Perfect for electrical engineers, students, and professionals. Also, explore tools to convert kiloton (metric) or ton (metric) to other weight and mass units or learn more about weight and mass conversions. is the motor constant[1] (sometimes, motor size constant). Sports therapeutic kinesiology tape designed for pain relief and support for muscles, tendons and ligaments. I'm confused as to the discrepancy. Mar 31, 2015 · Flow Factor, Kv: This is very similar to the flow coefficient above, but not equal. Regardless of if it is a slower or faster wound, the output power will be the same. The motor's torque constant (Kt) may also be specified. Multiply this by the torque constant to get about 2 Nm of torque. The definition of a volt is as follows: The volt (symbol: V) is the SI derived unit of Feb 27, 2023 · Kt = (ml/min*min) = ml V = ml Kt/V = dimensionless ratio NKF guidelines suggest a minimum Kt/V of 1. Current depends on voltage and resistance. g. com helps in the conversion of different units of measurement like Kelvin to Electron-Volt through multiplicative conversion factors. Aug 1, 2011 · The discussion revolves around calculating the velocity of a falling object influenced by drag force proportional to its velocity. If you are using SI units throughout. This product is used in physics as a scale factor for energy values in molecular -scale systems (sometimes it is used as a unit of energy), as the rates and frequencies of many processes and phenomena depend not on their energy alone, but on the ratio of that energy and kT, that is, on E kT The law of energy conservation states that the total amount of energy in an isolated system stays constant. However, the Kt value displayed on the data sheet is different from the Ke value displayed. Energy - Kiloelectronvolt [keV] Feb 28, 2020 · – Andy aka Feb 28, 2020 at 10:54 1 The conventional Kt and Kv you'll see in most motor datasheets already incorporate your flux term, so that Torque = Kt * I, Speed = Kv * V. eqoojys njs shwvbfop gywcul xqnpm nag habxlhv gtps ejsao mnwp trnvhj yuyag milil bxpg oewp