Motor braking power generation device
By connecting the thermistors, varistors, diodes, switching power supplies and supercapacitors that connect the DC bus of the motor drive inverter, it forms an electric braking regenerative power generation device, solving the problems of waste of renewable energy and harmonic interference, realizing energy saving of variable frequency drive equipment and improving the efficiency of high-speed rail entry and exit, and improving the safety of the power grid and electric vehicles.
Patent Information
- Application Number
- CN202510343985.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-23
- Publication Date
- 2025-07-04
AI Technical Summary
In the existing electric braking renewable power generation technology, renewable energy is wasteful and harmonic interference occurs when feeding back electric energy to the power grid, affecting the normal operation of the power grid and other electrical appliances.
By connecting the DC bus of the motor-driven inverter with the thermistor, varistor, diode, switching power supply, inverter and supercapacitor, an electric brake regenerative power generation device is formed to realize charging, storage and discharge of electrical energy, avoiding the consumption of regenerative power on the brake resistor and reducing feedback to the power grid.
It has achieved energy saving of 45% to 50% of the frequency converter driving equipment, improved the efficiency of high-speed rail entering and exiting the station, and had no impact on the power grid, improving the power efficiency and braking safety of electric vehicles.
Smart Images
Figure CN120263014A_ABST
Abstract
Description
Technical Field
[0001] An electric motor braking power generation device, specifically related to an electric motor braking regenerative power generation device. Background Art
[0002] Existing electric motor braking regenerative power generation technology and problems.
[0003] The existing technical solution for regenerative power generation processing during electric motor braking is: the electric energy is consumed on the braking resistor or fed back to the power grid with a unity power factor. The specific problems are as follows: (1) The renewable energy is wasted. (2) When feeding back electric energy to the power grid with a unity power factor, due to the high-speed switching of its internal inverter bridge and the influence of the dead zone, it brings harmonic interference to the power grid, and the emitted harmonics pollute the power grid and affect the normal operation of other electrical appliances. Summary of the Invention
[0004] An electric motor braking regenerative power generation device. It is circuit-connected to the DC bus of the motor drive frequency converter and includes a thermistor, a varistor, a diode, a switching power supply, an inverter, and a super capacitor to form an electric motor braking regenerative power generation device, realizing charging, storing, and discharging. When the electric motor brakes, the device charges the super capacitor, and when the electric motor operates and consumes power, the device discharges to the drive control device. The distinguishing features are as follows: (1) The renewable energy is consumed on the dynamic resistor; (2) When feeding back electric energy to the power grid with a unity power factor, it brings harmonic interference to the power grid and affects the normal operation of other electrical appliances.
[0005] Advantages of the technical solution of the present invention: (1) Achieve energy savings of 45% - 50% for frequency conversion drive equipment such as elevators, port machinery, and oil fields; (2) Can improve the efficiency of high-speed trains entering and leaving stations; (3) Do not feed back to the power grid, have no impact on the power grid, and have high electric energy efficiency; (4) Can shorten the braking distance of electric vehicles and improve safety. Description of the Drawings Figure 1 It is a structural diagram of the electric motor braking power generation device. 1 - Motor drive frequency converter, 2 - DC bus of the frequency converter, 3 - Charging circuit, 4 - Discharging circuit, 5 - Switching power supply, 6 - Inverter, 7 - Charging circuit, 8 - Discharging circuit, 9 - Super capacitor. Detailed Embodiments
[0007] 。A thermistor, a varistor, a diode, a switching power supply, an inverter, and a super capacitor are connected to the DC bus of the motor drive frequency converter through a circuit to form an electric motor braking and regenerative power generation device, which realizes charging, electricity storage, and discharging. When the electric motor brakes, the regenerated power generation electricity charges the device, and when the electric motor operates and consumes electricity, the device discharges electricity to the drive control device.
Claims
1. Electric motor braking and power generation device, characterized in that: The device connected to the DC bus of the motor drive frequency converter through a circuit includes a thermistor, a varistor, a diode, a switching power supply, an inverter, and a super capacitor. When the motor brakes, the device stores the regenerative electric energy in the super capacitor. When the motor operates and consumes power, the device discharges to the drive control device.