CONTROL DEVICE OF BRAKE SOLENOID COIL Russian patent published in 2018 - IPC H01H47/32 B66B5/00 B66B1/32 

FIELD: electricity.

SUBSTANCE: brake solenoid coil control device contains an electronic switch (8), self-induction e.m.f. limiter (11), electronic switch driver (15), rectifier (3). The first (16) and second (17) rectifier (3) inputs through the first and second contacts (20, 21) of the electromagnetic relay are connected to the AC network. The first output (2) of the rectifier (3) is connected to the first terminal (4) of the brake solenoid coil (5). The common output (6) of the rectifier (3) is connected to the common terminal (7) of the electronic switch (8) connected by the output (9) to the second terminal (10) of the brake solenoid coil (5). The self-induction e.m.f. limiter (11) is parallel connected to the coil (5). The input (12) and the common output (7) of the electronic switch (8) are connected to the output (13) and the common terminal (14) of the electronic switch driver (15), respectively. The first (18) and second (19) inputs of the electronic switch driver (15), respectively, are connected to the AC network through the first (20) and second (21) contacts of the electromagnetic relay. In this case, the response time of the electronic switch driver (15) is longer than the time during which the electromagnetic relay contacts bounce (20, 21), and the rise and fall time of the signal at its output does not exceed the time that limits the safe operation area of the electronic switch.

EFFECT: fast disconnection of the brake coil over a two-wire line, rather than a four-wire line, following safety and electromagnetic compatibility with other elevator electronic devices.

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