6. Power Supply Selection
The MC556 can match medium and small size stepping motors (from NEMA frame size
23 to 34) made by Lichuan or other motor manufactures around the world. To achieve
good driving performances, it is important to select supply voltage and output current
properly. Generally speaking, supply voltage determines the high speed performance of
the motor, while output current determines the output torque of the driven motor
(particularly at lower speed). Higher supply voltage will allow higher motor speed to be
achieved. If the motion speed requirement is low, it’s better to use lower supply voltage
to decrease noise, heating and improve reliability.
◆Supply Voltage of Power Supply Selection
The selection of power supply voltage of the hybrid stepping motor driver is generally a
wide range, and the supply voltage is usually chosen according to the operating speed
and response requirements of the motor. If the motor operating speed is high or the
response requirements are fast, then the voltage value is also high, but pay attention to
the supply voltage ripple can not exceed the maximum input voltage of the driver,
otherwise it may damage the driver. If the motor operating speed is low, you can consider
the lower voltage selection.
◆Output Current of Power Supply Selection
Power supply current is generally based on the driver's output current “I”. If use linear
power supply , the supply current is generally 1.1-1.3 times of “I”; if use the
switching power supply, the supply current is generally 1.5-2 times of“I”. If a power
supply supplies power to a few drivers at the same time, it should be considered that the
power supply current should be properly doubled.
