CN211508610U - Overvoltage protection circuit for power tube of brushless motor controller - Google Patents
Overvoltage protection circuit for power tube of brushless motor controller Download PDFInfo
- Publication number
- CN211508610U CN211508610U CN201922263300.XU CN201922263300U CN211508610U CN 211508610 U CN211508610 U CN 211508610U CN 201922263300 U CN201922263300 U CN 201922263300U CN 211508610 U CN211508610 U CN 211508610U
- Authority
- CN
- China
- Prior art keywords
- controller
- unit
- resistor
- power tube
- power
- 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
- Protection Of Static Devices (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model belongs to the technical field of the electric motor car of lithium cell package power supply, concretely relates to brushless motor controller power tube overvoltage crowbar, one of which brushless motor controller power tube overvoltage crowbar, a serial communication port, include: one end of the voltage division unit is connected with a bus power supply of the controller; the input end of the control unit is connected with the output end of the voltage division circuit; and the grid electrode of the power switch is connected with the output end of the control unit, and the source electrode of the power switch is connected with the controller bus. And the diode unit is connected with the drain electrode of the power switch and the motor unit. The utility model discloses in the electric motor car machine controller who uses the lithium cell package, add power tube overvoltage crowbar in its input positive and negative generating line, motor power generation voltage is too high when can preventing the disconnection of battery protection board charging tube bad controller power tube.
Description
Technical Field
The utility model belongs to the technical field of the electric motor car of lithium cell package power supply, concretely relates to brushless motor controller power tube overvoltage crowbar.
Background
The electric motor car that adopts lithium cell package power supply in the market at present, it can be because of the motor electricity generation charges for the battery when the battery is full of electricity, and makes the battery protection shield produce the overcharge protection, and generator electricity generation voltage nowhere is released when the lithium cell overcharge protection, can make the power tube bear too high voltage and damage. This has influenced the normal use of electric motor car greatly, has improved cost of maintenance.
In order to realize solving the problem, the utility model provides a brushless motor controller power tube overvoltage crowbar.
SUMMERY OF THE UTILITY MODEL
An object of the present invention is to solve at least the above problems and/or disadvantages and to provide at least the advantages which will be described later.
The utility model discloses it is still another purpose to provide brushless motor controller power tube overvoltage crowbar to overcome the lithium cell and do not have the department of generator generated voltage when overcharging the protection and release meeting, make the power tube bear the drawback of too high voltage and damage.
In order to realize these objects and other advantages in accordance with the present invention, the present invention provides a brushless motor controller power tube overvoltage protection circuit, including:
one end of the voltage division unit is connected with a bus power supply of the controller;
the input end of the control unit is connected with the output end of the voltage division circuit;
the grid electrode of the power switch is connected with the output end of the control unit, and the source electrode of the power switch is connected with a controller bus;
and the diode unit is connected with the drain electrode of the power switch and the motor unit.
Preferably, the voltage dividing unit includes resistors R1 and R2, one end of the resistor R1 is connected to the positive terminal of the controller bus power supply, the other end of the resistor R1 is connected to one end of the resistor R2 to form a point a, the point a is connected to the input positive terminal of the control unit, and the other end of the resistor R2 is connected to the negative terminal of the controller bus power supply.
Preferably, the control unit is an MCU, the input positive terminal of the MCU is connected to the voltage divider unit, a reference level is set inside the MCU, and the output terminal of the MCU is connected to the gate of the power switch.
Preferably, the power switch further comprises a resistor R3, one end of the resistor R3 is connected to the drain of the power switch, and the other end of the resistor R3 is connected to the positive output terminal of the diode unit.
Preferably, the diode unit comprises six diodes, the six diodes are connected in series in pairs and then connected in parallel to form the diode unit after being connected in parallel, the output end of the diode unit is connected with one end of the resistor R3, the input end of the diode unit is connected with the negative end of the controller bus power supply, and the connecting point of the two diodes in series is connected with the motor unit.
Preferably, the controller bus power supply further comprises a capacitor C1, one end of the capacitor C1 is connected to the junction of the output end of the diode unit and the resistor R3, and the other end of the capacitor C1 is connected to the negative end of the controller bus power supply.
The utility model discloses at least, include following beneficial effect:
1. the utility model provides a brushless motor controller power tube overvoltage crowbar, it can be through to controller for bus voltage resistance partial pressure input MCU inside, and compare with the reference voltage of MCU internal input, protect the controller power tube.
2. The utility model provides a brushless motor controller power tube overvoltage crowbar, it can overcome the lithium cell and generate electricity voltage when overcharging the protection and have no department to release, makes the power tube bear too high voltage and the drawback of damage.
3. The utility model provides a brushless motor controller power tube overvoltage crowbar, its simple structure, it is with low costs, there is market competition, facilitate promotion.
Drawings
Fig. 1 is a working schematic diagram of an overvoltage protection circuit for a power tube of a brushless motor controller according to the present invention;
fig. 2 is a signal waveform diagram of the present invention Q1G, Q2G, Q2D, VREF, and OUT;
wherein, the MCU: protection circuit control circuit, D1-D6: rectifier diode, R1, R2: voltage sampling resistance, Q9: power switch, R3: bleed-off resistance, C1: and a motor rectification filter capacitor.
Detailed Description
The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
In the present specification, when an element is referred to as being "connected to" or coupled to "or" disposed in "another element, it may be" directly connected to "or coupled to" or "directly disposed in" the other element. Or be connected or coupled to or disposed in another element with other elements interposed therebetween, unless it is volumetrically "directly coupled or connected to" or "directly disposed in" the other element. Further, it will be understood that when an element is referred to as being "on," "over," "under" or "under" another element, it can be "in direct" contact with the other element or in contact with the other element interposed therebetween, unless it is referred to as being in direct contact with the other element.
As shown in fig. 1, the utility model provides a brushless motor controller power tube overvoltage crowbar, include:
one end of the voltage division unit is connected with a bus power supply of the controller;
the input end of the control unit is connected with the output end of the voltage division circuit;
and the grid electrode of the power switch is connected with the output end of the control unit, and the source electrode of the power switch is connected with the controller bus.
And the diode unit is connected with the drain electrode of the power switch and the motor unit.
In the embodiment of the invention, the bus voltage of the controller is input to the control unit by the voltage dividing unit, and compared with the reference level of the control unit, if the bus voltage is lower than the reference level, the MCU outputs a low level to indicate that the power tube of the controller is not in overvoltage, and the protection circuit does not work. If the MCU is higher than the reference level, the MCU outputs a high level to indicate that the main power tube is over-voltage, and the protection circuit starts to work. And the bus voltage of the controller is a lithium battery pack unit.
On the basis of the above situation, specifically, the voltage dividing unit includes resistors R1 and R2, one end of the resistor R1 is connected to the positive terminal of the controller bus power supply, the other end of the resistor R1 is connected to one end of the resistor R2 to form a point a, the point a is connected to the input positive terminal of the control unit, and the other end of the resistor R2 is connected to the negative terminal of the controller bus power supply.
The resistor R1 and the resistor R2 divide the bus voltage of the controller to meet the voltage safety of the control unit and the whole protection circuit.
On the basis of the above situation, specifically, the control unit is an MCU, an input positive terminal of the MCU is connected to the voltage dividing unit, a reference level is set inside the MCU, and an output terminal of the MCU is connected to a gate of the power switch.
In the embodiment of the invention, the voltage of the bus of the controller is input into the MCU by the voltage division unit, the MCU can sample and compare the sampled voltage with the reference level in the MCU, and if the sampled voltage is lower than the reference level, the MCU outputs a low level to indicate that the power tube of the controller is not in overvoltage, so that the protection circuit does not work. If be higher than reference level MCU and explain that the main power tube has excessive pressure with regard to exporting the high level, protection circuit begins working, and all MCUs that can realize the various models of above-mentioned function can all be used in the utility model discloses in.
In addition to the above, specifically, the power supply further includes a resistor R3, one end of the resistor R3 is connected to the drain of the power switch, and the other end of the resistor R3 is connected to the positive output terminal of the diode unit.
The resistor R3 is a high-power discharge resistor, and heat dissipation modes such as heat pipes, air cooling, water cooling and the like are used for cooling the discharge resistor.
On the basis of the above situation, specifically, the diode unit includes six diodes, and two pairs of diodes are connected in series and then connected in parallel to form a diode unit after being connected in parallel, the output end of the diode unit is connected with one end of the resistor R3, the input end of the diode unit is connected with the negative end of the controller bus power supply, and the connection point of the two diodes connected in series is connected with the motor unit.
On the basis of the above situation, in particular, the controller bus power supply further comprises a capacitor C1, one end of the capacitor C1 is connected to the junction between the output end of the diode unit and the resistor R3, and the other end of the capacitor C1 is connected to the negative end of the controller bus power supply.
The capacitor C1 can remove impurities in a delayed mode.
The embodiment of the utility model provides brushless motor controller power tube overvoltage crowbar, divider resistance R1, R2 one end connects controller bus voltage's positive negative end respectively, its other end links together and MCU's input links to each other, MCU is inside to set for a reference level, the MCU output is connected to power switch Q9's grid, Q9's drain electrode connection bleeder resistance R3 passes through D1-D6 rectifier diode output positive end to the motor, Q9's source electrode is connected to the negative end of controller bus. For example, a certain electric vehicle system adopts 13 strings of lithium batteries for power supply, the overcharge voltage of the electric vehicle system is 55V, and a controller power tube adopts an 80V voltage-resistant power tube. We can set the motor rectified voltage not to exceed 90% of the power tube withstand voltage, that is, 72V, and if the MCU reference voltage is set to 2.5V, R1/R2 is (72-2.5)/5 is 13.9.
The working principle of the utility model is as follows: when the battery pack is fully charged, the charging pipe Q2 of the protection board is disconnected, the battery pack stops charging, and the electric vehicle motor accelerates due to no load when going downhill, and the motor voltage rises. The voltage of a bus of the controller is divided by a resistor and input into the MCU, the MCU can sample and compare with a reference level in the MCU, if the voltage is lower than the reference level, the MCU outputs a low level to indicate that a power tube of the controller is not in overvoltage, and a protection circuit does not work. If the MCU is higher than the reference level, the MCU outputs a high level to indicate that the main power tube is over-voltage, and the protection circuit starts to work.
The embodiment of the utility model discloses brushless motor controller power tube overvoltage crowbar, as shown in figure 1, still include empty unit, brushless motor control unit, these several prior art of motor unit of opening, empty unit of opening is connected with the positive and negative both ends of controller generating line, brushless motor control unit with empty unit of opening connects, motor unit with brushless motor controller unit connects, specifically six power tubes Q3-Q8 in the brushless motor controller unit, after two liang of series connections, parallelly connected again, again with motor unit connects, each looks in the three-phase machine of motor single unit is connected with the tie point E, F, G of two power tubes of two liang of series connections, tie point B, C, D after two diodes series connections in the diode unit is connected to each looks in the three-phase machine and the tie point E of two power tubes of two liang of series connections, F. G. Since the above mentioned elements are prior art, they will not be described in detail.
The utility model discloses in the electric motor car machine controller who uses the lithium cell package, add power tube overvoltage crowbar in its input positive and negative generating line, motor power generation voltage is too high when can preventing the disconnection of battery protection board charging tube bad controller power tube, it is concrete, if the voltage that the motor sent at the downhill path in-process is not more than the overcharge protection voltage of lithium battery protection board, protection circuit is out of work, after the overcharge voltage that reaches lithium battery protection board after the lithium cell is full of, the charging tube of lithium battery protection board is in the turn-off state, protection circuit begins work when the voltage that the motor sent surpasses the safety of setting value crisis controller power tube this moment, the electricity that sends the motor is through the rectification filter back through the bleeder resistance consumption, thereby the safety of controller power tube has been protected.
It is obvious that those skilled in the art can obtain various effects not directly mentioned according to the respective embodiments without trouble from various structures according to the embodiments of the present invention.
While embodiments of the invention have been disclosed above, it is not intended to be limited to the applications listed in the specification and the examples. It can be applicable to various and be fit for the utility model discloses a field completely. Additional modifications will readily occur to those skilled in the art. The invention is therefore not to be limited to the specific details and illustrations shown and described herein, without departing from the general concept defined by the claims and their equivalents.
Claims (6)
1. A brushless motor controller power tube overvoltage protection circuit, comprising:
one end of the voltage division unit is connected with a bus power supply of the controller;
the input end of the control unit is connected with the output end of the voltage division unit;
the grid electrode of the power switch is connected with the output end of the control unit, and the source electrode of the power switch is connected with a controller bus;
and the diode unit is connected with the drain electrode of the power switch and the motor unit.
2. The overvoltage protection circuit for the power tube of the brushless motor controller of claim 1, wherein the voltage divider unit comprises resistors R1 and R2, one end of the resistor R1 is connected to the positive terminal of the controller bus power supply, the other end of the resistor R1 is connected to one end of the resistor R2 to form a point a, the point a is connected to the positive input terminal of the control unit, and the other end of the resistor R2 is connected to the negative terminal of the controller bus power supply.
3. The overvoltage protection circuit for the power tube of the brushless motor controller according to claim 1, wherein the control unit is an MCU, the input positive terminal of the MCU is connected to the voltage divider, a reference level is set inside the MCU, and the output terminal of the MCU is connected to the gate of the power switch.
4. The power tube overvoltage protection circuit of the brushless motor controller according to claim 1, further comprising a resistor R3, wherein one end of the resistor R3 is connected to the drain of the power switch, and the other end of the resistor R3 is connected to the positive output terminal of the diode unit.
5. The power tube overvoltage protection circuit of the brushless motor controller according to claim 4, wherein the diode unit comprises six diodes, and the six diodes are connected in series and then connected in parallel to form a diode unit, wherein an output end of the diode unit is connected with one end of the resistor R3, an input end of the diode unit is connected with a negative end of the controller bus power supply, and a connection point of the two diodes in series is connected with the motor unit.
6. The brushless motor controller power tube overvoltage protection circuit of claim 4, further comprising a capacitor C1, wherein one end of said capacitor C1 is connected to the junction of the output terminal of said diode unit and said resistor R3, and the other end of said capacitor C1 is connected to the negative terminal of said controller bus power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922263300.XU CN211508610U (en) | 2019-12-17 | 2019-12-17 | Overvoltage protection circuit for power tube of brushless motor controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922263300.XU CN211508610U (en) | 2019-12-17 | 2019-12-17 | Overvoltage protection circuit for power tube of brushless motor controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211508610U true CN211508610U (en) | 2020-09-15 |
Family
ID=72416665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922263300.XU Active CN211508610U (en) | 2019-12-17 | 2019-12-17 | Overvoltage protection circuit for power tube of brushless motor controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211508610U (en) |
-
2019
- 2019-12-17 CN CN201922263300.XU patent/CN211508610U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205901410U (en) | Modular emergent guarantee power | |
| CN104253469A (en) | Secondary battery pack charging and discharging management system | |
| CN204375857U (en) | Plug-in hybrid-power automobile power battery pack | |
| CN204179989U (en) | Based on the scene oil complementary power generation system of DC bus | |
| CN107546830A (en) | A kind of super capacitor charger of the integrated pitch control based on DSP | |
| CN107370201A (en) | DC power system based on battery connection in series-parallel combination | |
| CN205986275U (en) | A quick charging device for large capacity battery | |
| CN105428735A (en) | Storage-control-integrated solar energy lithium battery module | |
| CN106059046A (en) | Combined emergency guarantee power source and power supply method thereof | |
| CN111251930A (en) | Direct current fills electric pile equipment | |
| CN211377693U (en) | Power transmission line hybrid power supply based on solar energy and induction energy obtaining | |
| CN201219206Y (en) | Multifunctional portable energy storing device | |
| CN211508610U (en) | Overvoltage protection circuit for power tube of brushless motor controller | |
| CN209402203U (en) | The efficient battery charge controller of pure electric automobile | |
| CN215990291U (en) | Special super capacitor charger for wind power pitch-variable driver based on PIC single chip microcomputer | |
| CN104242441A (en) | Solar energy and AC network collaborative charging system | |
| CN109624792A (en) | A kind of EMU power supply unit | |
| CN211579667U (en) | Direct current charging power supply system | |
| CN205945101U (en) | Modular super battery | |
| CN206041596U (en) | Intelligent charger | |
| CN203589818U (en) | Uninterrupted power supply system for operation of smart vehicle-mounted substation | |
| CN206697997U (en) | Photovoltaic generating system charge-discharge circuit | |
| CN206790356U (en) | Vehicle-mounted energy storage power device | |
| CN201601606U (en) | Power supply system of hybrid electric vehicle | |
| CN206264802U (en) | A kind of many battery pack joint electric supply installations of electric automobile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |