MS6 REDUCED VOLTAGE STARTER
Page 22
7.7 DC INJECTION BRAKING
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DC injection braking provides smooth braking for AC induction motors.
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DC injection offers adjustable braking because it is current controlled.
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Unlike a mechanical brake, an electrical brake will never wear out.
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The brake operates by injecting DC current in two phases of the motor to rapidly decelerate
it to zero speed.
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When stop is commanded the Opal Pro shuts off for 2 seconds to allow the voltage across
the motor to drop. The DC injection current is then applied at a level set in parameter 1104
for the amount of time set in parameter 1105. It does not provide zero speed sensing,
although if two wire control is used terminal 4 can be used to disable the DC injection
(activated = enabled).
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If braking is released before the motor stops, the motor will coast to rest. If the braking
remains on after the motor stops, the DC supply will provide a holding brake.
Содержание Opal Pro MS6 Series
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Страница 5: ...MS6 REDUCED VOLTAGE STARTER Page 4...
Страница 31: ...MS6 REDUCED VOLTAGE STARTER Page 30 10 2 THREE WIRE CONTROL Enable must be closed for starter to operate...
Страница 32: ...MS6 REDUCED VOLTAGE STARTER Page 31 10 3 THREE WIRE REVERSING Enable must be closed for starter to operate...
Страница 33: ...MS6 REDUCED VOLTAGE STARTER Page 32 10 4 THREE WIRE WITH BY PASS Enable must be closed for starter to operate...