Regenerative braking energy consumption system
By combining a series-exciting DC motor and fan in the regenerative braking energy consumption system, the brake resistor is connected in series and blowing air along the axial direction, the problem of overheating and high cost of the brake resistor in the wire rope electric hoist is solved, and more efficient energy consumption is achieved and heat dissipation effect to ensure the continuous operation of the motor.
Patent Information
- Application Number
- CN202323448470.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-18
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2033-12-18
AI Technical Summary
The existing regeneration energy consumption system has problems of overheating and high cost in wire rope electric hoists. Traditional methods such as four-quadrant inverters are expensive and not suitable for large-scale use. They are prone to heat when using resistors consume energy, and air-cooled cooling increases. Energy consumption is not worth the loss.
Design a regenerative braking energy consumption system, including a series-excited DC motor and a fan, connected in series with the brake resistor, and the air blade set blows the air axial along the brake resistor to enhance the heat dissipation effect, and realizes backup circuits and fans through relays and alarms To improve the heat dissipation effect by using aluminum or copper thermal sleeves and heat sinks.
Effectively reduce the power of the brake resistor by half, optimize costs, prevent overheating and shutdown, ensure that the motor is fully loaded and continuously operates, take away heat through the fan, improve heat dissipation effect, and reduce the risk of failure.
Smart Images
Figure CN222147435U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motor regenerative energy processing, in particular to a regenerative braking energy consumption system. Background Art
[0002] As is known, the heavy objects lifted by the wire rope electric hoist are typical potential loads, so when the heavy objects are lowered, the motor will be in a power generation state; the motor driven by the inverter generates regenerative energy when the motor is in a power generation state, which cannot be consumed by itself under normal circumstances. Traditional technology generally consumes energy in two ways. One is to use a four-quadrant inverter to feed back the feedback energy to the power grid through inverter rectification, but it is expensive and not conducive to large-scale use on electric hoists; the second is to use a resistor to consume the feedback energy, but when using a braking resistor to consume energy, if the energy is continuous and too large, the braking resistor will quickly heat up and trigger the thermistor, causing the inverter to report a fault. If a fan powered by an additional power supply is used to cool the braking resistor, it will increase energy consumption instead, which is not worth the loss. Utility Model Content
[0003] In order to overcome the deficiencies in the background technology and solve the existing technical problems, the utility model discloses a regenerative braking energy consumption system, which can not only improve the heat dissipation effect of the braking resistor, but also optimize the cost.
[0004] In order to achieve the above-mentioned invention object, the utility model adopts the following technical solutions:
[0005] A regenerative braking energy consumption system comprises a braking resistor connected to a motor loop circuit; the braking resistor is connected in series with a series-excited DC motor, a wind blade group is installed at the output shaft end of the series-excited DC motor to form a fan, the wind blade group corresponds to the end face spacing of the braking resistor, and the blowing direction of the wind blade group is along the axial direction of the braking resistor.
[0006] Furthermore, the series-excited DC motor is set to a wide voltage motor of 0VDC to 1140VDC.
[0007] Furthermore, the series-excited DC motor is also connected in series with a relay, and the series circuit part of the series-excited DC motor and the relay is connected in parallel with a standby circuit, and the standby circuit is connected in series with a normally open contact of the relay.
[0008] Furthermore, an alarm is connected in series to the backup circuit.
[0009] Furthermore, a heat-conducting sleeve is provided on the outer wall surface of the brake resistor, and a plurality of rows of heat-dissipating fins are provided on the outer wall of the heat-conducting sleeve along the axial direction of the brake resistor.
[0010] Furthermore, the heat-conducting sleeve and the heat sink are made of aluminum or copper.
[0011] Due to the adoption of the above-mentioned technical solution, the utility model has the following beneficial effects:
[0012] The regenerative braking energy consumption system disclosed by the utility model consumes energy through the braking resistor and the fan at the same time when the motor has energy feedback, which not only reduces the power of the braking resistor by half on the original basis, thereby optimizing the overall cost, but also the heat generated by the braking resistor and the fan can be taken away in large quantities through the corresponding axial blowing, thereby preventing overheating and shutdown, and ensuring that the motor can continue to work at full load. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a structural schematic diagram of the utility model;
[0014] Figure 2 It is a connection circuit schematic diagram of the utility model.
[0015] In the figure: 1. Braking resistor; 2. Fan; 201. Series-excited DC motor; 202. Fan blade assembly; 3. Relay; 4. Normally open contact; 5. Alarm. DETAILED DESCRIPTION
[0016] The technical solution of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" and the like indicating directions or positional relationships, they are only corresponding to the drawings of the present invention, for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction:
[0017] Combined with Figure 1-2 The regenerative braking energy consumption system comprises a braking resistor 1 connected to a motor loop circuit, and the regenerative electric energy fed back by the motor is consumed by heating the braking resistor 1; the braking resistor 1 is connected in series with a series-excited DC motor 201, and the series-excited DC motor has the characteristics that the higher the voltage, the higher the speed and the greater the air volume. The series-excited DC motor 201 is set as a wide voltage motor of 0VDC to 1140VDC, which can adapt to different power supply voltages. The output shaft end of the series-excited DC motor 201 is installed with a wind blade group 202 to form a fan 2, and the wind blade group 202 is set as an axial flow fan, which can provide a large air volume. The wind blade group 202 corresponds to the end face interval of the braking resistor 1, and the blowing direction of the wind blade group 202 is along the axial direction of the braking resistor 1. The heat generated by the braking resistor 1 and the fan 2 can be taken away in large quantities through the corresponding axial blowing, thereby preventing overheating and shutdown, and ensuring that the motor can continue to work at full load.
[0018] As needed, the series-excited DC motor 201 is also connected in series with a relay 3. The series circuit part of the series-excited DC motor 201 and the relay 3 is connected in parallel with a backup circuit. The backup circuit is connected in series with the normally open contact 4 of the relay 3. If the fan is damaged and the circuit is broken, causing the relay 3 to lose power, the normally open contact 4 is closed and the backup circuit is turned on, so that the braking resistor 1 can continue to consume energy and prevent the fan 2 from not working due to damage. In addition, an alarm 5 is also connected in series with the backup circuit. When the backup circuit is enabled, the alarm 5 can sound an alarm to remind the maintenance and replacement of the fan 2.
[0019] As required, the outer wall of the brake resistor 1 is provided with a heat-conducting sleeve, and the outer wall of the heat-conducting sleeve is provided with multiple rows of heat sinks along the axial direction of the brake resistor 1, which increases the heat dissipation area and improves the heat dissipation effect; in addition, the heat-conducting sleeve and the heat sink are made of aluminum or copper.
[0020] When the regenerative braking energy consumption system of the utility model is implemented, the overall structure of the original electrical box remains unchanged, and only a fan needs to be installed on the end face of the braking resistor and connected according to the circuit.
[0021] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the above-mentioned embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure marks in the claims should not be regarded as limiting the content of the claims involved.
Claims
1. A regenerative braking energy consumption system, comprising a braking resistor (1) connected to a motor circuit, characterized in that: The braking resistor (1) is connected in series with a series-excited DC motor (201); a wind blade group (202) is mounted on the output shaft end of the series-excited DC motor (201) to form a fan (2); the wind blade group (202) corresponds to the end face spacing of the braking resistor (1), and the blowing direction of the wind blade group (202) is along the axial direction of the braking resistor (1).
2. The regenerative braking energy consumption system according to claim 1, characterized in that: The series-excited DC motor (201) is a wide voltage motor of 0 VDC to 1140 VDC.
3. The regenerative braking energy consumption system according to claim 1, characterized in that: The series-excited DC motor (201) is also connected in series with a relay (3), and a standby circuit is connected in parallel to the series circuit portion of the series-excited DC motor (201) and the relay (3), and a normally open contact (4) of the relay (3) is connected in series to the standby circuit.
4. The regenerative braking energy consumption system according to claim 3, characterized in that: The standby circuit is also connected in series with an alarm (5).
5. The regenerative braking energy consumption system according to claim 1, characterized in that: The outer wall surface of the brake resistor (1) is provided with a heat-conducting sleeve, and the outer wall of the heat-conducting sleeve is provided with a plurality of rows of heat sinks along the axial direction of the brake resistor (1).
6. The regenerative braking energy consumption system according to claim 5, characterized in that: The heat-conducting sleeve and the heat sink are made of aluminum or copper.