Electric motor drive
First Claim
1. An AC or DC electric motor drive, comprising:
- safety switches determined by the safety of the electric motor drive,a controlled mechanical brake, as well as a power supply circuit of the brake control,a power converter having a network rectifier and a power rectifier of the motor, which power rectifier of the motor is at least partly implemented with controlled semiconductor switches arranged into a bridge, and an intermediate circuit between the network rectifier and the power rectifier of the motor, anda switch arrangement including two normally-open switches in the intermediate circuit of the power converter, of which a first switch is connected in series to the positive intermediate circuit busbar between the output of the network rectifier and the input of the power rectifier of the motor, and a second switch is connected in series to the negative intermediate circuit busbar between the output of the network rectifier and the input of the power rectifier of the motor,wherein the power rectifier of the motor includes;
a quick-stop switch, andan amplifier circuit connected to the control pole of the controlled semiconductor switch, the electricity supply of which is arranged to occur via the aforementioned quick-stop switch, andwherein the semiconductor switches are fitted to switch into a conductive state when the amplifier circuit is in a controlled active state, andwherein the amplifier circuit supplied via the aforementioned quick-stop switch is fitted alternatively either in connection with the controlled semiconductor switches connected to the positive intermediate circuit busbar, in connection with the controlled semiconductor switches connected to the negative intermediate circuit busbar or in connection with the controlled semiconductor switches connected to both the positive and the negative intermediate circuit busbar.
1 Assignment
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Accused Products
Abstract
The invention relates to a switch arrangement of an electric motor drive (1). The electric motor drive comprises safety switches (3) determined by the safety of the drive, a controlled mechanical brake (4), a power supply circuit (5) of the brake control, a power converter (6), which power converter comprises a network rectifier (7) and a power rectifier (8) of the motor. The power rectifier of the motor is at least partly implemented with controlled semiconductor switches (9, 10) arranged into a bridge. The power converter comprises an intermediate circuit (11, 12) between the network rectifier and the power rectifier of the motor. The switch arrangement comprises normally-open switches (13, 14) in the intermediate circuit of the power converter (6).
38 Citations
20 Claims
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1. An AC or DC electric motor drive, comprising:
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safety switches determined by the safety of the electric motor drive, a controlled mechanical brake, as well as a power supply circuit of the brake control, a power converter having a network rectifier and a power rectifier of the motor, which power rectifier of the motor is at least partly implemented with controlled semiconductor switches arranged into a bridge, and an intermediate circuit between the network rectifier and the power rectifier of the motor, and a switch arrangement including two normally-open switches in the intermediate circuit of the power converter, of which a first switch is connected in series to the positive intermediate circuit busbar between the output of the network rectifier and the input of the power rectifier of the motor, and a second switch is connected in series to the negative intermediate circuit busbar between the output of the network rectifier and the input of the power rectifier of the motor, wherein the power rectifier of the motor includes; a quick-stop switch, and an amplifier circuit connected to the control pole of the controlled semiconductor switch, the electricity supply of which is arranged to occur via the aforementioned quick-stop switch, and wherein the semiconductor switches are fitted to switch into a conductive state when the amplifier circuit is in a controlled active state, and wherein the amplifier circuit supplied via the aforementioned quick-stop switch is fitted alternatively either in connection with the controlled semiconductor switches connected to the positive intermediate circuit busbar, in connection with the controlled semiconductor switches connected to the negative intermediate circuit busbar or in connection with the controlled semiconductor switches connected to both the positive and the negative intermediate circuit busbar. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification