Electricity: motive power systems – Braking – Dynamic braking
Reexamination Certificate
2007-01-30
2007-01-30
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Braking
Dynamic braking
C318S376000, C318S379000, C318S380000, C318S381000, C318S362000, C318S366000, C318S268000, C318S269000, C318S727000, C318S757000, C318S759000
Reexamination Certificate
active
10748228
ABSTRACT:
A motor power supply including a DC supply part having a pair of supply terminals; an inverter having a pair of connection terminals respectively connected to the supply terminals thereof to receive DC power therefrom and to supply AC power to a motor, a breaking resistor and a control switching element disposed in parallel in an additional line connecting the pair of connection terminals to each other, a control switching element disposed with the breaking resistor in the additional line, a breaking switch disposed to one of the connection terminals and switched to either a normal position or a breaking position connecting the one connection terminal to a corresponding supply part or to the additional line, a speed detector detecting a motor speed and a control part controlling the breaking switch to switch to the breaking position and controlling the control switching element so that an on-off interval of the control switching element is controllable depending on the detected speed.
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Donovan Lincoln
Glass Erick
Staas & Halsey , LLP
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