Electric motor drive employing hybrid,...

Details Electric motor drive employing hybrid,... Electric motor drive employing hybrid,...

2011-03-15

2011-03-15

Benson, Walter (Department: 2837)

Electricity: motive power systems

Braking

Dynamic braking

C318S376000, C318S377000, C318S378000, C318S379000

Reexamination Certificate

active

07906922

ABSTRACT:
A dynamic braking circuit for an electronic motor drive shunts the DC link of the drive with a resistor using two control strategies. The first control strategy used for lower levels of braking employs a pulse width modulated signal and the second control strategy used for higher levels of braking uses a hysteretic signal significantly reducing switching losses in the semiconductor devices controlling the dynamic braking resistor allowing higher braking capacity.

REFERENCES:
patent: 5910892 (1999-06-01), Lyons et al.
patent: 6058031 (2000-05-01), Lyons et al.
patent: 6078156 (2000-06-01), Spurr
patent: 6577483 (2003-06-01), Steicher et al.

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