Holding brake control circuit for servo-motor
First Claim
1. For use in conjunction with a servo-motor having an electrically operated holding brake, said holding brake having a pair of electric brake terminals in which the brake remains in a released condition as long as at least a preset brake voltage is maintained to the electric brake terminals, a brake control circuit comprising:
- a pair of output terminals connected to said pair of electric brake terminals, a pair of power input terminals connected to an electric power source, said power source having a higher voltage than said preset brake voltage, at least one capacitor electrically connected in parallel with said input terminals, a voltage regulator having power inputs connected in parallel with said capacitor and having a regulated voltage output connected in parallel with said output terminals, said voltage regulator having a regulated voltage output greater than or equal to said preset brake voltage, whereby, upon failure of said power supply, said holding brake control circuit maintains said holding brake in a released condition for a period of time following said power supply failure.
2 Assignments
0 Petitions
Accused Products
Abstract
A holding brake control circuit is provided for use in conjunction with a servo-motor having an electrically operated holding brake. The holding brake has a pair of electric brake terminals and the brake is retained in a released condition as long as at least a preset brake voltage is maintained to the brake terminals. The holding brake control circuit includes a pair of output terminals connected to the electric brake terminals as well as a pair of power input terminals electrically connected to an electric power source. The electric power source, furthermore, has a higher voltage than the preset brake voltage. At least one capacitor is electrically connected in parallel with the input terminals so that the capacitor charges when power is applied to the input terminals. A voltage regulator has power inputs connected in parallel with the capacitor and a regulated voltage output connected in parallel with the output terminals for the control circuit. The voltage regulator has a regulated output voltage greater than or equal to the preset brake voltage. Upon failure of the power supply or main power outage, the brake control circuit maintains the brake in a released condition for a period of time following failure of the power supply.
24 Citations
8 Claims
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1. For use in conjunction with a servo-motor having an electrically operated holding brake, said holding brake having a pair of electric brake terminals in which the brake remains in a released condition as long as at least a preset brake voltage is maintained to the electric brake terminals, a brake control circuit comprising:
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a pair of output terminals connected to said pair of electric brake terminals, a pair of power input terminals connected to an electric power source, said power source having a higher voltage than said preset brake voltage, at least one capacitor electrically connected in parallel with said input terminals, a voltage regulator having power inputs connected in parallel with said capacitor and having a regulated voltage output connected in parallel with said output terminals, said voltage regulator having a regulated voltage output greater than or equal to said preset brake voltage, whereby, upon failure of said power supply, said holding brake control circuit maintains said holding brake in a released condition for a period of time following said power supply failure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification