Power Supply Selection - ECG tb6560 User Manual

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The 3 Generation TB6560 Stepper Driver Set

6. Power Supply Selection

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The 3 Generation TB6560 stepper driver can match Large and small size stepping motors (from Nema size 17 to 34) made by us
or other motor manufactures around the world, as long as the rated current of the motors is within 0.5-3.5A(Peak Current) . 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, at the price of
more noise and heating. If the motion speed requirement is low, it's better to use lower supply voltage to decrease noise, heating
and improve reliability.
I. Regulated or Unregulated Power Supply
Both of regulated and unregulated DC power supplies can be used to supply 3
unregulated power supplies are preferred due to their ability to withstand current surge. If regulated power supplies (such as most
off switching supplies.) are indeed used, it is important to have large current output rating to avoid problems like current clamp,
for example using 4A supply for 3A motor-driver operation. On the other hand, if unregulated supply is used, one may use a
power supply of lower current rating than that of motor (typically 50%～70% of motor current). The reason is that the driver
draws current from the power supply capacitor of the unregulated supply only during the ON duration of the PWM cycle, but not
during the OFF duration. Therefore, the average current withdrawn from power supply is considerably less than motor current.
For example, two 3A motors can be well supplied by one power supply of 4A rating. Although the unregulated power supplies
are preferred, considering the cost, the cheap and easy-to-use regulated switching supplies in the market is also a good choice for
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the 3 Generation TB6560 stepper driver and motors, as long as the total output current of the regulated switching supplies is
larger than the motor's total rated current. Anyway, if users don't know how to select the suitable power supplies for the 3
Generation TB6560 stepper driver and motors, please feel free to contact with us for assistances.
II. Selecting Supply Voltage
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The 3 generation TB6560 stepper driver can actually operate within 12 ~ 36VDC for different motors. Higher supply voltage
can increase motor torque at higher speeds, thus helpful for avoiding losing steps. However, higher voltage may cause more
motor vibration at lower speed, and it may also cause motor overheat and drive damage. Therefore, it is suggested to choose
12-16VDC supply to power the Nema17 motors, 16-24V supply to power the Nema23/24 motors and 24V-36V supply to power
the Nema34 Motors.
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Figure 10: 8-lead motor parallel (higher speed) connections
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Generation TB6560 stepper driver. However,
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