Contents
Why do I need to increase my stepper motor voltage?
This power loss increases the temperature of the motor, which can damage the motor if it is too great. Stepper motor drive bus voltages are a tool that can be used to tune the performance of your system. By increasing the bus voltage the driver runs on, the speed and torque and power output of the motor all increase.
When to reduce the current on a stepper drive?
But when the motor idles, or holds position, it requires much less torque. These instances are a good time to reduce motor current. Most modern stepper drives do this automatically. For example, the drive might reduce idle current to 50% of the running current.
What is the current rating of a stepper motor?
Stepper motors come with a nameplate current rating, winding resistance, output torque and voltage rating. The important value is the current rating. Torque is generated proportionally to the winding current. The current rating on the nameplate is the winding current required to produce the rated torque output of the motor.
How can I reduce the temperature of my step motor?
Continue making adjustments until the motor mispositions or stalls. Then slightly increase the current so the motor resumes accurate positioning. In some cases — especially when a step motor is oversized for an application — the engineer can reduce running current enough to measurably reduce the temperature of the motor.
What should voltage drop between drive and motor?
Voltage drop between drive and motor terminals should not exceed 3%. Unbalance greater than 2% is problematic. Use a motor drive analyzer to check for motor voltage unbalance across the three output phases.
What are the benefits of increasing motor voltage?
Further increasing the voltage creates even faster responses. The primary benefit, as discussed in the last section is the improvement in rise time, which translates to a higher possible operating speed. Other benefits of an increased rise time include higher operating torque and higher mechanical power output.
How do you measure voltage on a motor?
Measure the voltage on each terminal and record each measured voltage for use in the next step. Measure voltage unbalance at full load. Use a motor drive analyzer with a current clamp on all three drive output terminals separately to measure the current draw on each terminal.