Contents
How much power does a stepper motor need?
That is to say, a 6 amp per phase motor will require a 4 amp power supply when wired in parallel and a 2 amp power supply when wired in series. If multiple motors and drives are used, add the current requirements of each to arrive at the total power supply current rating.
How does the phase lag of a stepper motor work?
The drive is a current source in the constant torque region and adds no additional phase lag. In the constant power region, however, the drive is a voltage source so it introduces an additional 90-degree phase lag. The total phase lag now is 180 degrees, which is a setup for a sustained and building motor oscillation.
How does a stepper motor work on a gecko?
Below a certain speed, called the corner speed, the current would rise above the motor’s rated current, ultimately to destructive levels as the motor’s speed is reduced further. This can be seen in Figure 1. To prevent this, the drive must be set to limit the motor current to its rated value.
Why does a stepper motor stall in the speed band?
Though it is possible to accelerate through the resonant region, it is not possible to operate the motor continuously in the speed band. This is because the oscillation that causes the motor to stall takes from half a second to 10 seconds to build to an amplitude sufficient to stall the motor.
The stepper motor would require a 48-V power supply (see Figure 3). Eric Rice is an application engineer at Applied Motion Products.
What is the current of a stepper motor?
Stepper motors have a rated voltage and current. A typical stepper motor like our NEMA 17 might have a rated voltage of 2.8 Volts and a maximum current of 1.68 Amps. This basically means if you hook it up to 2.8 Volts it will draw 1.68 Amps.
What to look for in a stepper motor power supply?
When choosing a DC power supply for your stepper motor, you’re going to want to take note of three things: the voltage, the current, and the power supply type. The most complicated factor of these three is usually voltage and current, so we’ll cover those first.
Can a stepper be used with a constant voltage driver?
But some motors have very low coil resistance. Strictly following those formulas, the drive voltage will be less than 5v and performance will not be good. This type of motor is not a good match for a constant-voltage driver. These steppers require a more specialized controller.
What happens if you mismatch the driver on a stepper?
Mismatched motors and drivers can result in disappointing performance. Or worse: damage to the motor and/or controller. Voltage – The maximum voltage that the driver can supply to the motor. Continuous Current – The maximum current that the driver can supply to the motor. “Peak” current ratings are not applicable to stepper motors.
Can a Chopper drive drive a stepper motor?
It is not unusual to drive stepper motors at several times their rated voltage using a chopper drive. To keep things safe at these higher voltages, the chopper drive also monitors the current being delivered to the motor and “chops” it before it exceeds a pre-set level.