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2-4. How to Control Voltage (during abnormal operation)

1) Voltage Control

$ Normal Voltage

DC-link voltage after wave rectification is directly impressed to IPM as 310 ~ 330V.

When motor starts operation, DC voltage changes with energy consumed by motor and/

or counter electromotive force of motor.

% Identifying Abnormal Voltage

A. Occurrence of counter electromotive force

+ In case of 450V or higher

B. Instant power failure and excessive energy consumption

+ In case of 185V or lower

2-5. How to Control Current (during abnormal operation+B227)

1) Current Abnormality Detection

$ Abnormal if DC current flowing through IPM measured during high-speed motor rotation is

10A~12A or higher

% Detection of abnormal current to be carried out by saving higher value among instant current values

and updating the data

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Asko H8 Specifiche Pagina 25