CN211405898U - Motor braking circuit - Google Patents
Motor braking circuit Download PDFInfo
- Publication number
- CN211405898U CN211405898U CN202020023078.6U CN202020023078U CN211405898U CN 211405898 U CN211405898 U CN 211405898U CN 202020023078 U CN202020023078 U CN 202020023078U CN 211405898 U CN211405898 U CN 211405898U
- Authority
- CN
- China
- Prior art keywords
- circuit
- switch circuit
- switch
- motor
- diode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Stopping Of Electric Motors (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
The utility model relates to a motor control field especially relates to a motor braking circuit, include: the controller and the first switch circuit, the second switch circuit, the third switch circuit, the fourth switch circuit that are connected with the controller, first switch circuit, second switch circuit, third switch circuit, fourth switch circuit are connected with the motor and constitute H bridge control circuit, at least one control end in first switch circuit, second switch circuit, third switch circuit, the fourth switch circuit is connected with dissipation circuit, dissipation circuit includes resistance R1 and the switching element SW5 of connection at resistance R1 both ends that one end is connected with the control end. The utility model discloses possess following beneficial effect: make switching circuit switching loss and conduction loss all increase through dissipation circuit to reach the braking effect, the voltage lifting that the BOOST circuit led to is consumed because of switching loss's increase simultaneously, thereby maintains the stability of busbar voltage.
Description
Technical Field
The utility model relates to a motor control field especially relates to a motor braking circuit.
Background
The motor control of the electric upright post is generally two, one is that four switching tubes of an H bridge control the positive and negative rotation and the rotating speed of one motor; the other type is that the positive and negative rotation of the motor is controlled through two relays, and one switch tube controls the rotating speed of the motor.
The H bridge is used for controlling the motor, and the motor rotating at high speed is braked in three modes: the first one is to control the conduction of two high-level or low-level switching tubes of the H bridge to short circuit a motor winding, and to immediately stop the motor by using a reverse current generated by the counter electromotive force of the motor; the second one is that 4 switch tubes are all turned off, and the motor is freely stopped by the rotation friction force of the motor; and thirdly, slowly reducing the duty ratio of the H bridge to controllably and slowly stop the motor speed.
The third control mode can cause the voltage of the H-bridge bus to rise, as shown in fig. 1, when the motor is in a normal operation state, the switch tube SW4 is conducted, the switch tubes SW1 and SW2 are in a complementary duty ratio, current flows into the motor Vemf1 pin, and flows out of the motor Vemf 2 pin, and the motor is in a motor working state. The duty cycle of the switch SW1 is slowly decreased and the current flowing into the motor is decreased and eventually reduced to zero. When the motor rotates, the current of the motor flows out from the 1 foot and flows in from the 2 feet, and the motor is in a generator working mode. In the working state of the generator, the motor has an internal winding inductor L1, the switching tubes SW1 and SW2 are also in complementary duty cycles, and the circuit is equivalent to a boost circuit at this time, so that the voltage is increased, and high-voltage stress is brought to an H bridge and a power supply.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, the utility model provides a motor braking circuit.
A motor braking circuit comprising: the controller and the first switch circuit, the second switch circuit, the third switch circuit, the fourth switch circuit that are connected with the controller, first switch circuit, second switch circuit, third switch circuit, fourth switch circuit are connected with the motor and constitute H bridge control circuit, at least one control end in first switch circuit, second switch circuit, third switch circuit, the fourth switch circuit is connected with dissipation circuit, dissipation circuit includes resistance R1 and the switching element SW5 of connection at resistance R1 both ends that one end is connected with the control end.
Preferably, the first switch circuit includes a switch element SW1 and a diode D1, the drain of the switch element SW1 is connected to the third switch circuit, the source of the switch element SW1 is connected to the second switch circuit, the gate of the switch element SW1 is connected to the controller, the anode of the diode D1 is connected to the second switch circuit, and the cathode of the diode D1 is connected to the third switch circuit.
Preferably, the second switch circuit includes a switch element SW2 and a diode D2, the drain of the switch element SW2 is connected to the first switch circuit, the source of the switch element SW2 is connected to the fourth switch circuit, the gate of the switch element SW2 is connected to the controller, the anode of the diode D2 is connected to the fourth switch circuit, and the cathode of the diode D2 is connected to the first switch circuit.
Preferably, the third switch circuit includes a switch element SW3 and a diode D3, the drain of the switch element SW3 is connected to the first switch circuit, the source of the switch element SW3 is connected to the fourth switch circuit, the gate of the switch element SW3 is connected to the controller, the anode of the diode D3 is connected to the fourth switch circuit, and the cathode of the diode D3 is connected to the first switch circuit.
Preferably, the fourth switch circuit includes a switch element SW4 and a diode D4, the drain of the switch element SW4 is connected to the third switch circuit, the source of the switch element SW4 is connected to the second switch circuit, the gate of the switch element SW4 is connected to the controller, the anode of the diode D4 is connected to the second switch circuit, and the cathode of the diode D4 is connected to the third switch circuit.
Preferably, the mobile terminal further comprises a power supply connected to the first switch circuit, the second switch circuit, the third switch circuit and the fourth switch circuit.
Preferably, the power supply further comprises a filter circuit connected across the power supply.
Preferably, the filter circuit comprises a capacitor C1 connected in parallel with the power supply.
The utility model discloses possess following beneficial effect: the dissipation circuit is connected with at least one control end of the switch circuit, the second switch circuit, the third switch circuit and the fourth switch circuit, the switch tube is connected with two ends of the dissipation circuit, and the switch tube is controlled to be disconnected under the braking condition, so that the driving resistance of the switch circuit is increased, the switching loss and the conduction loss of the switch circuit are increased, the braking effect is achieved, and meanwhile, the voltage lifting caused by the BOOST circuit is consumed due to the increase of the switching loss, and the stability of the bus voltage is maintained.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic circuit diagram of the background art of the present invention;
fig. 2 is a schematic circuit diagram of an H-bridge control circuit in a motor braking circuit according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a motor braking circuit according to an embodiment of the present invention;
fig. 4 is another schematic circuit diagram of a motor braking circuit according to an embodiment of the present invention;
fig. 5 is another schematic circuit diagram of a motor braking circuit according to an embodiment of the present invention;
fig. 6 is another schematic circuit diagram of a motor braking circuit according to an embodiment of the present invention;
fig. 7 is a schematic circuit diagram of a motor braking circuit according to another embodiment of the present invention;
fig. 8 is another schematic circuit diagram of a motor braking circuit according to another embodiment of the present invention;
fig. 9 is a schematic circuit diagram of a motor braking circuit according to another embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be further described below with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
Example one
The basic idea of this embodiment is to connect a dissipation resistor at the control end of any switch circuit, and connect a switch tube at the two ends of the dissipation circuit, under the braking condition, control the switch tube to be disconnected, so that the drive resistance of the switch circuit is increased, so that the switching loss and the conduction loss of the switch circuit are both increased, thereby achieving the braking effect, and the voltage BOOST caused by the BOOST circuit is consumed due to the increase of the switching loss, thereby maintaining the stability of the bus voltage.
Based on the above idea, an embodiment of the present invention provides a motor braking circuit, as shown in fig. 2, including: the controller, and the first switch circuit, the second switch circuit, the third switch circuit, the fourth switch circuit that are connected with the controller, first switch circuit, second switch circuit, third switch circuit, fourth switch circuit and motor are connected and are constituted H bridge control circuit.
Specifically, the first switch circuit includes a switch element SW1 and a diode D1, the drain of the switch element SW1 is connected to the third switch circuit, the source of the switch element SW1 is connected to the second switch circuit, the gate of the switch element SW1 is connected to the controller, the anode of the diode D1 is connected to the second switch circuit, and the cathode of the diode D1 is connected to the third switch circuit.
Specifically, the second switch circuit includes a switch element SW2 and a diode D2, the drain of the switch element SW2 is connected to the first switch circuit, the source of the switch element SW2 is connected to the fourth switch circuit, the gate of the switch element SW2 is connected to the controller, the anode of the diode D2 is connected to the fourth switch circuit, and the cathode of the diode D2 is connected to the first switch circuit.
Specifically, the third switch circuit comprises a switch element SW3 and a diode D3, the drain of the switch element SW3 is connected with the first switch circuit, the source of the switch element SW3 is connected with the fourth switch circuit, the gate of the switch element SW3 is connected with the controller, the anode of the diode D3 is connected with the fourth switch circuit, and the cathode of the diode D3 is connected with the first switch circuit.
Specifically, the fourth switch circuit includes a switch element SW4 and a diode D4, the drain of the switch element SW4 is connected to the third switch circuit, the source of the switch element SW4 is connected to the second switch circuit, the gate of the switch element SW4 is connected to the controller, the anode of the diode D4 is connected to the second switch circuit, and the cathode of the diode D4 is connected to the third switch circuit.
It should be noted that, the first switch circuit, the second switch circuit, the third switch circuit, and the fourth switch circuit may use MOS transistors including parasitic diodes inside instead of the combination of the switch elements and the diodes, and may have the same circuit control effect.
In an embodiment, the motor further comprises a power supply connected with the first switch circuit, the second switch circuit, the third switch circuit and the fourth switch circuit, and the power supply is used for supplying power for normal operation of the motor.
In one embodiment, a filter circuit is also included that is connected across the power supply. Specifically, the filter circuit includes a capacitor C1 connected in parallel with the power supply.
In one embodiment, as shown in fig. 3, the control terminal of the second switch circuit is connected to a dissipation circuit, which includes a resistor R1 having one end connected to the control terminal, and a switch element SW5 connected across the resistor R1. Under the condition that the motor normally rotates forward, the switch element SW4 is a normally closed switch, the switch element SW5 is switched on, and the dissipation resistor R1 has no effect. In the braking condition, the controller controls the switching elements SW1 and SW2 to turn on complementary duty cycles to brake the motor, and controls the switching element SW5 to be turned off, and the dissipation resistor R1 participates in the driving of the switching element SW 2. Because the driving resistance of the switching element SW2 is increased, the switching loss and the conduction loss of the switching element SW2 are increased, and therefore the better braking effect of the forward rotation of the motor is achieved.
In another embodiment, as shown in fig. 4, the control terminal of the third switch circuit is connected to the dissipation circuit, the principle is the same as that of the above embodiment, and therefore, a better braking effect of the motor in reverse rotation can be achieved.
In another embodiment, as shown in fig. 5, the control terminal of the first switching circuit is connected to a dissipation circuit, the principle is the same as that of the above embodiment, and therefore the circuit can achieve a better braking effect when the motor rotates forwards.
In another embodiment, as shown in fig. 6, the control terminal of the fourth switch circuit is connected to a dissipation circuit, the principle is the same as that of the above embodiment, so that the circuit can achieve a better braking effect of motor reverse rotation.
Example two
The second embodiment is different from the first embodiment in that a dissipation circuit is connected to control ends of two of the first switch circuit, the second switch circuit, the third switch circuit and the fourth switch circuit to achieve a better braking effect of the motor rotation.
In an embodiment, as shown in fig. 7, a dissipation circuit is connected to the control terminals of the first switch circuit and the second switch circuit, the principle is the same as that of the above embodiment, so that the circuit can achieve better braking effect for forward rotation and reverse rotation of the motor.
In another embodiment, as shown in fig. 8, a dissipation circuit is connected to the control terminals of the first switch circuit and the third switch circuit, the principle is the same as that of the above embodiment, so that the circuit can achieve better braking effect for forward rotation of the motor, and simultaneously avoid the loss of only one switch circuit and reduce the service life.
It can be understood that the control ends of the other two switching circuits are connected with the dissipation circuit, which can also achieve a better braking effect, and are the same based on the principle, and therefore, the description is omitted.
EXAMPLE III
The difference between the third embodiment and the first embodiment is that, as shown in fig. 9, a dissipation circuit is connected to the control terminals of the first switch circuit, the second switch circuit, the third switch circuit, and the fourth switch circuit to achieve a better braking effect of the motor rotation.
Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (8)
1. A motor braking circuit, comprising: the controller and the first switch circuit, the second switch circuit, the third switch circuit, the fourth switch circuit that are connected with the controller, first switch circuit, second switch circuit, third switch circuit, fourth switch circuit are connected with the motor and constitute H bridge control circuit, at least one control end in first switch circuit, second switch circuit, third switch circuit, the fourth switch circuit is connected with dissipation circuit, dissipation circuit includes resistance R1 and the switching element SW5 of connection at resistance R1 both ends that one end is connected with the control end.
2. The motor braking circuit of claim 1, wherein the first switch circuit comprises a switch element SW1 and a diode D1, the drain of the switch element SW1 is connected to the third switch circuit, the source of the switch element SW1 is connected to the second switch circuit, the gate of the switch element SW1 is connected to the controller, the anode of the diode D1 is connected to the second switch circuit, and the cathode of the diode D2 is connected to the third switch circuit.
3. The motor braking circuit of claim 1, wherein the second switch circuit comprises a switch element SW2 and a diode D2, the drain of the switch element SW2 is connected to the first switch circuit, the source of the switch element SW2 is connected to the fourth switch circuit, the gate of the switch element SW2 is connected to the controller, the anode of the diode D2 is connected to the fourth switch circuit, and the cathode of the diode D2 is connected to the first switch circuit.
4. The motor braking circuit of claim 1, wherein the third switch circuit comprises a switch element SW3 and a diode D3, the drain of the switch element SW3 is connected to the first switch circuit, the source of the switch element SW3 is connected to the fourth switch circuit, the gate of the switch element SW3 is connected to the controller, the anode of the diode D3 is connected to the fourth switch circuit, and the cathode of the diode D3 is connected to the first switch circuit.
5. The motor braking circuit of claim 1, wherein the fourth switch circuit comprises a switch element SW4 and a diode D4, the drain of the switch element SW4 is connected to the third switch circuit, the source of the switch element SW4 is connected to the second switch circuit, the gate of the switch element SW4 is connected to the controller, the anode of the diode D4 is connected to the second switch circuit, and the cathode of the diode D4 is connected to the third switch circuit.
6. The motor braking circuit according to any one of claims 1 to 5, further comprising a power supply connected to the first switch circuit, the second switch circuit, the third switch circuit, and the fourth switch circuit.
7. A motor braking circuit according to claim 6, further comprising a filter circuit connected across the power supply.
8. A motor braking circuit according to claim 7, characterised in that the filter circuit comprises a capacitor C1 connected in parallel with the power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020023078.6U CN211405898U (en) | 2020-01-07 | 2020-01-07 | Motor braking circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020023078.6U CN211405898U (en) | 2020-01-07 | 2020-01-07 | Motor braking circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211405898U true CN211405898U (en) | 2020-09-01 |
Family
ID=72233325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020023078.6U Active CN211405898U (en) | 2020-01-07 | 2020-01-07 | Motor braking circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211405898U (en) |
-
2020
- 2020-01-07 CN CN202020023078.6U patent/CN211405898U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20070241719A1 (en) | Electric power system | |
| US20140211524A1 (en) | Power converter and pre-charging circuit of same | |
| JP2012196143A (en) | Motor control device | |
| JP2013503556A (en) | Power transistor with turn-off control and method of operation thereof | |
| JP3816449B2 (en) | Motor drive device | |
| JP3661630B2 (en) | Hybrid vehicle drive device and control method thereof | |
| CN211405898U (en) | Motor braking circuit | |
| JP5049251B2 (en) | Motor control device | |
| CN111130398B (en) | Motor H bridge braking circuit | |
| US7119519B2 (en) | Control apparatus for on-vehicle generator that sends power from the battery to the field winding and from the field winding back to the battery | |
| JP3950263B2 (en) | Motor drive power converter | |
| JP3763291B2 (en) | Control method for driving device of hybrid vehicle | |
| CN114655071A (en) | Battery, battery control method and electric vehicle | |
| WO2019163080A1 (en) | Voltage switching-type dc power supply | |
| JP4459532B2 (en) | Motor control device | |
| WO2019180912A1 (en) | Voltage switching type direct-current power supply | |
| CN219697475U (en) | Simplified control device for magnetic suspension bearing | |
| JP2002369404A (en) | Motor drive circuit for power tool | |
| CN117811558B (en) | High-side driving circuit, control method thereof and vehicle | |
| CN110572095B (en) | Direct current brush motor control system with reversing function for electric automobile | |
| JP2001247273A (en) | Elevator operating device at service interruption | |
| JPH0823601A (en) | Regenerated power absorbing circuit for electric vehicle | |
| CN216751291U (en) | Low-loss uninterrupted DC power supply circuit | |
| CN220342228U (en) | Motor start-stop control system | |
| CN220457386U (en) | Hybrid solid state switching device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |