TH39399A - Brake control device with auxiliary power source pathway. - Google Patents

Abstract

The DC60 is a brake control device for elevators, incorporating an auxiliary power source to charge, energize, or partially energize the brake coil (electromagnetic brake) during brake release and activate the brake coil. Using the charged energy at the time of brake release, the DC voltage is accelerated only when the brake is engaged, and the voltage acceleration function is stopped, allowing the original DC power source voltage to be used as the control power source. This enables the provision of a brake control device for elevators, addressing the tendency for the power source voltage to drop even without a sufficiently high voltage source available during brake release. Even with a single DC power source, brake release is possible by supplying the required energy to the brake coil separately from the power source voltage at the time of brake release. When the rear brake is engaged, it is possible to provide a brake control device for the elevator and the tendency for the power source voltage to drop. Even if it is not equipped with a high-voltage power source that is necessary and sufficient at the moment of brake release, and even with only a single DC power source, the brake can be released by supplying the required power to the brake coil separately from the power source voltage at the moment of brake release.

Claims (8)

1. Brake control device for elevator, consisting of: a control path for controlling the up/down movement of the elevator; a brake path with a brake wheel on the rotating shaft of the elevator drive motor, allowing the elevator to move up/down and braking the drive motor; a path for gripping the brake wheel with a clamp attached to a spring-loaded power transmission; and a path for releasing the brake coil by contracting against the spring's compressive force and supplying energy to the brake coil wound around the power transmission. This is followed by a path for releasing the brake coil by supplying energy to the brake coil as commanded by the control path, and a path for an auxiliary power source to store energy to drive the brake coil and activate it by supplying the stored energy to the brake release path when the brake wheel is released. 2. A brake control device for the elevator as specified in Requisition 1, in which the auxiliary power source pathway supplies energy stored prior to brake release to the brake release pathway, activating the brake coil, causing it to contract, transmit power, and release the brakes. 3. Brake control device for the elevator as specified in Requisition 1, whereby the auxiliary power source path supplies power to the brake coils upon the brake release command at the moment of brake wheel release, and the brake release path supplies power to the brake coils after the brake wheel is released upon the brake release command to maintain brake wheel release. 4. The brake control device for the elevator as specified in claim 3, which includes a brake release sensor for detecting brake wheel release, to which power is supplied to the brake coil via an auxiliary power source, from a point in time when a brake release command is sent as an output to activate the brake coil until the point in time when the brake release sensor detects brake wheel release. 5. The brake control device for the elevator as specified in Requisition 1, where the auxiliary power source path includes the voltage acceleration path to accelerate the power source voltage and the condenser charged by the voltage acceleration path, and where the base current of the accelerated voltage of the condenser and the current provided by the voltage acceleration path are supplied to the brake windings. 6. Brake control device for the elevator as specified in Requisition 1, where the auxiliary power source pathway supplies a first accelerated voltage to the brake coil at the time of brake wheel release, and supplies a second, lower voltage to the brake coil when brake release is required. 7. The brake control device for the elevator consists of control pathways for controlling the up/down movement of the elevator; a brake pathway with a brake wheel on the rotating shaft of the elevator drive motor, which causes the elevator to move up and down, to brake the rotation of the drive motor. The brake wheel is gripped by a clamp attached to a spring-loaded power transmission, and the brake wheel is released by contracting against the spring's compressive force, energizing the brake coil, which is then activated and wound around the power transmission. The brake release pathway releases the brake wheel by activating the brake coil. The brake power source is connected to the brake release pathway via a closed contact upon triggering the brake release command. The brake power source includes a optional auxiliary power source pathway to increase the voltage of the power source, and a voltage acceleration command pathway, which instructs the brake power source to supply the accelerated voltage to the brake release pathway at the point when the brake release command is sent as an output, thus activating the brake to the point where it is released. 8. A brake control device for the elevator as specified in claim 7, whereby the auxiliary power source pathway supplies a first accelerated voltage to the brake coil at the time of brake release, and supplies a second, lower voltage to the brake coil when brake release is required.