Shenzhen Hpmont Technology Co., Ltd
Chapter 1 Safety Information and Precautions
HD20 Series Inverters User Manual
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Chapter 1 Safety Information and Precautions
1.1 Safety Definition
Danger:
A Danger contains information which is critical for avoiding safety
hazard.
Warning:
A Warning contains information which is essential for avoiding a
risk of damage to product or other equipments.
Note:
A Note contains information which helps to ensure correct operation
of the product.
1.2 About Motor and Load
Compared to the standard frequency operation
The HD20 series inverters are voltage-type frequency inverter and their output is PWM wave with
certain harmonic wave. Therefore, the temperature, noise and vibration of the motor will be a little
higher than that at standard frequency operation.
Constant torque at low-speed operation
When the inverter drives a standard motor at low-speed running for a long time, the output torque
ratings will become worse due to the motor cooling is less effective. In that case, we suggest that
you should choose variable frequency motor.
Motor’s overload protecting threshold
When choose the adaptive motor, the inverter can effectively implement the motor thermal
protection. Otherwise it must adjust the motor protection parameters or other protection
measures to ensure that the motor is at a safe and reliable operation.
Operation above the motor rated frequency
If the motor exceeds its rated frequency operation, the noise will increase. It need play attention
to the motor vibration as well as ensure the motor bearings and mechanical devices to meet the
requirement of operation speed range.
Lubrication of mechanical devices
At long time low-speed operation, it should provide periodical lubrication maintenance for the
mechanical devices such as gear box and geared motor etc. to make sure the drive results meet
the site need.
Mechanical resonance point of load
Danger
Warning
Note
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