What is the resistance of a BLDC motor?

Brushless dc motors (BLDC) are 3 phase synchronous motors used in a configuration to be treated as dc drives. For the winding resistance use an ohmmeter. For a dc motor measure the resistance between the 2 armature wires. If it is a WYE connected BLDC motor, the resistance is the line-to-line resistance.

How do you measure the resistance of a DC motor?

Touch the leads of the meter to the two motor leads. The meter should read a low resistance in the area from 10 to 30 ohms. If the meter reads an infinite ohms reading or an open circuit, rotate the end shaft of the motor. The meter should give various ohm readings as the motor shaft is rotated.

How do you measure motor resistance?

mikeoz said: As I understand it, calculating the resistance is possible by applying a small current to the motor and measuring the voltage with a multimeter. That’s exactly what a digital multi-meter does when on an Ohms range. Just use a DMM and measure with the motor unpowered and the armature in various positions.

How do you test a motor resistance?

Touch the red (positive) lead of the multimeter to the positive end of the wire windings around the motor. Touch the black (negative) lead of the multimeter to the negative end of the wire windings around the motor. The reading that appears on the multimeter screen is the resistance in ohms.

How do you calculate motor impedance?

Formula Cheatsheet

1. Impedance Z = R or XLor XC(if only one is present)
2. Impedance in series only Z = √(R2 + X2) (if both R and one type of X are present)
3. Impedance in series only Z = √(R2 + (|XL – XC|)2) (if R, XL, and XC are all present)
4. Impedance in any circuit = R + jX (j is the imaginary number √(-1))

How do you find the resistance of a motor?

Use the DMM and set it in resistance mode to measure the DC resistance. Your resistance should be in the range of 0.1 ~ 50 ohm or so depending on the motor type. Since you know R, you can find X. This, assuming that the motor is stalled when you have measured the current.

How many ohms should a motor read?

With a multimeter, measure the resistance between motor frame (body) and earth. A good motor should read less than 0.5 ohms. Any value greater 0.5 ohms indicate trouble with the motor.

What is winding resistance and how it can be measured?

Winding resistance is defined as the resistance of a length of copper wires from one end to the other. It is a measurement of DC voltage and current in regard to Ohm’s law, where R (resistance) is equal to V (voltage) divided by I (amps).