CN210404722U - Bilateral current hardware protection circuit device suitable for brushless direct current motor driver - Google Patents
Bilateral current hardware protection circuit device suitable for brushless direct current motor driver Download PDFInfo
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- CN210404722U CN210404722U CN201920927918.9U CN201920927918U CN210404722U CN 210404722 U CN210404722 U CN 210404722U CN 201920927918 U CN201920927918 U CN 201920927918U CN 210404722 U CN210404722 U CN 210404722U
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Abstract
The utility model relates to a two side electric current hardware protection circuit devices suitable for brushless DC motor driver, including current sensor, current sensor's communication port is provided with signal following amplifier circuit, and signal following amplifier circuit's output is connected with current protection comparison circuit, and current protection comparison circuit's input still is connected with current-limiting reference circuit, and current protection comparison circuit's output is connected with control module. Therefore, by utilizing the current double-side protection, the protection can be triggered no matter the maximum value or the minimum value, the stability is high, and the safety and the reliability are higher. The protection circuit adopts a driver to output the maximum value and the minimum value of the current in real time to trigger protection, and the protection response speed is high. The circuit has simple structure, low cost and easy implementation.
Description
Technical Field
The utility model relates to a two side electric current hardware protection circuit devices suitable for brushless DC motor driver.
Background
With the use of the brushless direct current motor in a plurality of fields in a large range, the related technology and products of the brushless direct current motor driver are more and more emphasized, safety and reliability are important points of concern in the new energy industry, and therefore the brushless direct current motor driver must be embodied in the driver aspect and becomes a technical advantage.
However, the conventional brushless dc motor only uses a simple circuit comparator to participate in protection, and cannot realize high-low frequency conversion during implementation, so that the analysis and comparison capabilities of circuit parameters are poor, and the actual protection is affected.
Disclosure of Invention
The utility model aims at providing a two side electric current hardware protection circuit device suitable for brushless DC motor driver in order to solve the above-mentioned problem that exists among the prior art.
The purpose of the utility model is realized through the following technical scheme:
bilateral current hardware protection circuit arrangement suitable for brushless DC motor driver, including current sensor, wherein: the communication port of the current sensor is provided with a signal following amplifying circuit, the output end of the signal following amplifying circuit is connected with a current protection comparison circuit, the input end of the current protection comparison circuit is further connected with a current-limiting reference circuit, and the output end of the current protection comparison circuit is connected with a control module.
Further, the above mentioned double-side current hardware protection circuit device for the brushless dc motor driver, wherein: and a current limiting upper limit module and a current limiting lower limit module are arranged between the current protection comparison circuit and the current limiting reference circuit.
Furthermore, the above mentioned double-side current hardware protection circuit device for the brushless dc motor driver is provided, wherein: still including the device receiver, be provided with the lid on the device receiver, be provided with the label groove on the lid, the label inslot is provided with the label subassembly.
Furthermore, the above mentioned double-side current hardware protection circuit device for the brushless dc motor driver is provided, wherein: the storage box is internally provided with a heat dissipation assembly, the heat dissipation assembly is a heat dissipation fan, and a ventilation hole is formed in the position, corresponding to the heat dissipation fan, of the storage box.
Furthermore, the above mentioned double-side current hardware protection circuit device for the brushless dc motor driver is provided, wherein: a plurality of radiating fins are arranged in the storage box.
Furthermore, the above mentioned double-side current hardware protection circuit device for the brushless dc motor driver is provided, wherein: the control module is provided with an alarm component which is a buzzer or an LED lamp.
Still further, the above mentioned double-side current hardware protection circuit device for the brushless dc motor driver, wherein: the control module is provided with a communication assembly, and the communication assembly is a Wi-Fi transmission assembly or a 4G/5G transmission module.
The utility model discloses technical scheme's advantage mainly embodies:
1. by utilizing the current bilateral protection, the protection can be triggered no matter the maximum value or the minimum value, so that the stability is high, and the safety and the reliability are higher.
2. The protection circuit adopts a driver to output the maximum value and the minimum value of the current in real time to trigger protection, and the protection response speed is high.
3. The circuit has simple structure, low cost and easy implementation.
Drawings
Objects, advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments. These embodiments are merely exemplary embodiments for applying the technical solutions of the present invention, and all technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the scope of the present invention. Among the drawings, in which,
fig. 1 is a schematic diagram of a double-side current hardware protection circuit device (open box cover) suitable for a brushless dc motor driver.
Fig. 2 is a schematic diagram of the overall circuit of the present invention.
Wherein: 1. a current sensor; 2. a signal following amplifying circuit; 3. a current protection comparison circuit; 4. a current limiting reference circuit; 5. a control module; 6. a storage box; 7. a box cover; 8. a label assembly; 9. a heat radiation fan; 10. a vent hole; 11. a heat dissipating fin; 12. an alarm component; 13. and a communication component.
Detailed Description
Example (b):
the double-side current hardware protection circuit device suitable for the brushless dc motor driver shown in fig. 1 and fig. 2 includes a current sensor 1, and is distinguished in that: the communication port of the current sensor 1 is provided with a signal following amplification circuit 2. Meanwhile, the output end of the signal following amplifying circuit 2 is connected with a current protection comparison circuit 3, and the input end of the current protection comparison circuit 3 is also connected with current-limiting reference current. The output end of the current protection comparison circuit 3 is connected with a control module 5.
Just the utility model discloses an embodiment of preferred sees, in order to promote the current protection effect, installation and current-limiting upper limit module and current-limiting lower limit module between current protection comparison circuit 3 and current-limiting reference circuit 4. Simultaneously, in order to facilitate the all kinds of brushless DC motor's of adaptation driver protection needs, the utility model discloses still including device receiver 6, be provided with lid 7 on the device receiver 6. Thus, an integrated structure can be realized, and only the interface of the current sensor 1 needs to be reserved outside during actual assembly. And, be provided with the label groove on lid 7, be provided with label subassembly 8 in the label groove. In this way, a user is facilitated to quickly select a suitable device during implementation.
Further, in order to satisfy the long-time protection and use, local overheating cannot be caused, a heat dissipation assembly is arranged in the storage box 6, the heat dissipation assembly is a heat dissipation fan 9, and a ventilation hole 10 is formed in the position, corresponding to the heat dissipation fan 9, of the storage box 6. Therefore, an air duct is convenient to establish, and air flow cooling is realized. Naturally, in order to reduce the temperature of the current protection comparison circuit 3 during the full load operation, a plurality of heat radiation fins 11 are provided in the housing case 6. In this way, better heat dissipation can be achieved without causing heat accumulation in the current protection comparator circuit 3 or other circuit parts.
In view of practical use, in order to timely and simultaneously perform intervention control by operation and maintenance personnel when abnormal protection is detected, the control module 5 is provided with an alarm component 12, and the alarm component 12 is a buzzer or an LED lamp. Meanwhile, in order to realize remote notification of an abnormal state during unattended operation, the control module 5 is provided with a communication component 13. In particular, the communication component 13 is a Wi-Fi transmission component, taking into account the remote data communication needs of the backend device. Of course, in consideration of the stability of real-time data transmission, a multi-point layout may be implemented, and the communication component 13 may also be formed by a 4G/5G transmission module.
As shown in fig. 2, it is the circuit diagram of the present invention, the principle is to use the resistors R4, R6, R7 to divide voltage to generate two current protection setting values Ref +, Ref-, and set the resistance parameter in fig. 2, and the voltage values of Ref +, Ref-are 1.67V and 3.33V, respectively. Meanwhile, the integrated circuit U1 is a voltage follower, plays roles of buffering and isolating, the input Ia and Ib of the integrated circuit are voltage values corresponding to the current collected by the current sensor, and the resistor R2 and the resistor C5, the resistor R10 and the resistor C13 respectively form a first-order filter, so that the output voltage of the current sensor is more stable, and harmonic components higher than the cut-off frequency of the filter are removed. Here, the current sensors U3 and U4 are powered by 5V, the sampling range is 200A, and the output reference voltage is 2.5V, i.e., the current output voltages Ia and Ib of 0A correspond to 2.5V. Thus, the voltage values of Ref +, Ref-are-66.4A and 66.4A, respectively, corresponding to-67V and 3.33V.
Meanwhile, the integrated circuits U2 and U5 are voltage comparators, and output pins 1 and 7 of the voltage comparators are respectively pulled up to 5V through a resistor R1, a resistor R5, a resistor R9 and a resistor R11. Specifically, when the output is at a high level when there is no overcurrent fault, if the output pin 1 level of U1 is higher than the pin 2 Ref + of U2, the output pin 1 level signal of U2 will be inverted from a high level to a low level, i.e., 0V. If the output pin 1 level of U1 is lower than the pin 5 Ref of U2, the output pin 7 level signal of U2 will also flip to low level, i.e., 0V. Finally, the signals are output to the control unit through diodes D1 and D2, respectively, and the control unit issues a shutdown command.
Similarly, if the output pin 7 of U1 is higher than the pin 2 Ref + of U5, the output pin 1 level signal of U5 will be inverted from high to low, i.e., 0V. If the output pin 7 level of U1 is lower than the pin 5 Ref of U5, the output pin 7 level signal of U5 will also flip to low level, i.e., 0V. Finally, the signals are output to the control unit through diodes D3 and D4 respectively, and the control unit sends out a stop command to realize protection.
Can find out through foretell characters expression, adopt the utility model discloses afterwards, can realize the two side protection of driver output current under the prerequisite that does not influence the control performance requirement, the maximum value of electric current and minimum any trigger setting value protection circuit all give the control unit and send fault signal promptly, and this protection possesses the response fast for system safety, reliable and have more stability.
The utility model has the advantages as follows:
1. by utilizing the current bilateral protection, the protection can be triggered no matter the maximum value or the minimum value, so that the stability is high, and the safety and the reliability are higher.
2. The protection circuit adopts a driver to output the maximum value and the minimum value of the current in real time to trigger protection, and the protection response speed is high.
3. The circuit has simple structure, low cost and easy implementation.
The above-mentioned embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which should not be construed as limiting the scope of the present invention. All modifications made according to the spirit of the main technical scheme of the present invention shall be covered within the protection scope of the present invention.
Claims (6)
1. The utility model provides a two side electric current hardware protection circuit device suitable for brushless DC motor driver, including current sensor, its characterized in that: the communication port of the current sensor is provided with a signal following amplifying circuit, the output end of the signal following amplifying circuit is connected with a current protection comparison circuit, the input end of the current protection comparison circuit is also connected with a current-limiting reference circuit, and the output end of the current protection comparison circuit is connected with a control module; and a current-limiting upper limit module and a current-limiting lower limit module are arranged between the current protection comparison circuit and the current-limiting reference circuit.
2. The double-sided current hardware protection circuit arrangement for a brushless dc motor driver of claim 1, wherein: still including the device receiver, be provided with the lid on the device receiver, be provided with the label groove on the lid, the label inslot is provided with the label subassembly.
3. The double-sided current hardware protection circuit arrangement for a brushless dc motor driver of claim 2, wherein: the storage box is internally provided with a heat dissipation assembly, the heat dissipation assembly is a heat dissipation fan, and a ventilation hole is formed in the position, corresponding to the heat dissipation fan, of the storage box.
4. The double-sided current hardware protection circuit arrangement for a brushless dc motor driver of claim 2, wherein: a plurality of radiating fins are arranged in the storage box.
5. The double-sided current hardware protection circuit arrangement for a brushless dc motor driver of claim 1, wherein: the control module is provided with an alarm component which is a buzzer or an LED lamp.
6. The double-sided current hardware protection circuit arrangement for a brushless dc motor driver of claim 1, wherein: the control module is provided with a communication assembly, and the communication assembly is a Wi-Fi transmission assembly or a 4G/5G transmission module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920927918.9U CN210404722U (en) | 2019-06-19 | 2019-06-19 | Bilateral current hardware protection circuit device suitable for brushless direct current motor driver |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920927918.9U CN210404722U (en) | 2019-06-19 | 2019-06-19 | Bilateral current hardware protection circuit device suitable for brushless direct current motor driver |
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| CN210404722U true CN210404722U (en) | 2020-04-24 |
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| CN201920927918.9U Active CN210404722U (en) | 2019-06-19 | 2019-06-19 | Bilateral current hardware protection circuit device suitable for brushless direct current motor driver |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110265973A (en) * | 2019-06-19 | 2019-09-20 | 贵州航天林泉电机有限公司苏州分公司 | Bilateral electric current hardware protection circuit device suitable for brushless direct current motor driver |
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2019
- 2019-06-19 CN CN201920927918.9U patent/CN210404722U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110265973A (en) * | 2019-06-19 | 2019-09-20 | 贵州航天林泉电机有限公司苏州分公司 | Bilateral electric current hardware protection circuit device suitable for brushless direct current motor driver |
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