11. Heat Dissipation 12. Other Functions 13. Consumption Current
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１１．Heat Dissipation
Caution
Please dissipate heat generated by driver and motor enough.
If it is insufficient, temperature rise causes malfunction, failure or fire.
Keep the motor’s maximum case temperature below 100℃ and driver’s below 60℃ by adjusting
the drive current or by installing a cooling fin, fan, etc.
１２．Other Functions
12-1 Auto. current down
After about 0.3 seconds of inactivity, current will be reduced to 50% of running current. This
reduces driver and motor heat generation during idle periods.
12-2 Low voltage protection circuit
The driver has a built-in low voltage protection circuit to prevent current overload. The low supply
voltage condition normally occurs when power is turned ON.
１３．Consumption Current
The current consumed by driver and motor varies, depending on the supply voltage, pulse (clock)
frequency, motor’s inductance, rated current and holding torque. Also, the ripple according to the
cycle of PWM and RPM is added into the consumption current. Please use the power supply
which current is more than 2.4 times the rated current of the motor as a standard.
If other devices share the same power supply and voltage change can’t be allowed, then use the
power supply which can flow 1.7 times of the max value of the supply current, or incorporate a large
capacitor.
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