Low-maintenance-cost permanent magnet synchronous motor driving circuit

Abstract

The invention discloses a low-maintenance-cost permanent magnet synchronous motor driving circuit. The low-maintenance-cost permanent magnet synchronous motor driving circuit comprises a driving subsystem, an IGBT driving circuit and a main control module; the driving subsystem comprises a rectifying and filtering circuit, a direct-current bus, a voltage sensor circuit, a direct-current sensor circuit, a switch power circuit, a fault protection circuit and an IGBT module circuit; the rectifying and filtering circuit, the direct-current bus and the IGBT module circuit are sequentially connectedbetween an external power grid and a motor in series; an over-current fault signal output end which is connected with the IGBT module circuit and the main control module separately is arranged on theIGBT driving circuit; and PWM signal, enabling signal and brake signal output ends connected with the IGBT driving circuit are arranged on the main control module. By means of the mode, the low-maintenance-cost permanent magnet synchronous motor driving circuit is provided; and the IGBT driving circuit and an IGBT driving module are separated in design, so that when a power device is damaged, thedriving circuit does not need to be replaced together, thereby lowering the maintenance cost.

Description

technical field [0001] The invention relates to the technical field of motor drive, in particular to a low-maintenance cost permanent magnet synchronous motor drive circuit. Background technique [0002] The motor is an electromagnetic device that realizes the conversion or transmission of electric energy according to the law of electromagnetic induction. Its main function is to generate driving torque, which is used as a power source for other electrical appliances or various machines. It is also one of the most critical components in modern processing technology. [0003] The motor controller refers to the active work of the integrated circuit to control the motor to work according to the set position, direction, speed, angle and response time. A dedicated motor controller can make the application of the motor more extensive and the output efficiency higher. [0004] At present, the overall control scheme of the motor is mainly composed of a controller and a driver. The c...

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Problems solved by technology

[0006] The technical problem mainly solved by the present invention is to provide a permanent magnet synchronous motor drive circuit with low maintenance cost, which is used to solve the problem that when the power device is damaged, it needs to be replaced together with the drive circuit to increase the maintenance cost, and the same series of different power The drive production cost is relatively large and other issues

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