Elevator system with a brake control circuit using a controllable switch switched with short pulses
First Claim
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1. A brake control circuit, comprising:
- a first controllable switch that controls electricity supply of a winding of a brake, wherein the first controllable switch is switched in a controlled manner with short pulses by a control circuit of the electricity supply of the winding of the brake, and thus the braking function is controlled; and
a second controllable switch, wherein the first controllable switch, the winding of the brake and the second controllable switch are electrically connected in series, and the first controllable switch and the second controllable switch are electrically connected to opposite ends of the winding of the brake, respectively.
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Abstract
An elevator system and a brake control circuit include a first switch that controls the electricity supply of the winding of the brake, which switch is connected in a controlled manner with the control of the electricity supply of the winding of the brake, and thus the braking function is controlled.
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Citations
20 Claims
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1. A brake control circuit, comprising:
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a first controllable switch that controls electricity supply of a winding of a brake, wherein the first controllable switch is switched in a controlled manner with short pulses by a control circuit of the electricity supply of the winding of the brake, and thus the braking function is controlled; and a second controllable switch, wherein the first controllable switch, the winding of the brake and the second controllable switch are electrically connected in series, and the first controllable switch and the second controllable switch are electrically connected to opposite ends of the winding of the brake, respectively. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 19, 20)
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2. A brake control circuit, comprising:
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a first controllable switch that controls electricity supply of a winding of the brake, wherein the first controllable switch is switched in a controlled manner with short pulses by a control circuit of the electricity supply of the winding of the brake, and thus the braking function is controlled, wherein after the electricity supply of the winding of the brake has been disconnected, the energy stored in the winding is discharged into an intermediate circuit of the brake control circuit via release branch.
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3. A brake control circuit, comprising:
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a first controllable switch that controls electricity supply of a winding of the brake, wherein the first controllable switch is switched in a controlled manner with short pulses by a control circuit of the electricity supply of the winding of the brake, and thus the braking function is controlled, wherein when voltage of the intermediate circuit exceeds a set limit value, energy is discharged into an attenuation circuit electrically connected in parallel with the winding of the brake.
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4. A brake control circuit, comprising:
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a first controllable switch that controls electricity supply of a winding of the brake, wherein the first controllable switch is switched in a controlled manner with short pulses by a control circuit of the electricity supply of the winding of the brake, and thus the braking function is controlled, wherein a capacitor is connected between two rails that transfer output current and return current to an intermediate circuit of the brake control circuit.
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15. A elevator system, comprising:
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a movement control system, which adjusts movement of the elevator car according to a set reference current, at least a first brake and a second brake, wherein both the first brake and the second brake a moving part of the elevator machine; and a brake control circuit for controlling the first brake and the second brake, wherein the brake control circuit includes a first controllable switch that controls electricity supply of a winding of the first brake, wherein the first controllable switch is switched in a controlled manner with short pulses by a control circuit of the electricity supply of the winding of the first brake, and thus the braking function is controlled. - View Dependent Claims (16, 17, 18)
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Specification