CN211351904U - Direct current explosion-proof motor - Google Patents
Direct current explosion-proof motor Download PDFInfo
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- CN211351904U CN211351904U CN202020300236.8U CN202020300236U CN211351904U CN 211351904 U CN211351904 U CN 211351904U CN 202020300236 U CN202020300236 U CN 202020300236U CN 211351904 U CN211351904 U CN 211351904U
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- 230000005611 electricity Effects 0.000 claims abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052799 carbon Inorganic materials 0.000 abstract description 6
- 238000001816 cooling Methods 0.000 abstract 1
- 230000029087 digestion Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 206010053615 Thermal burn Diseases 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000819 phase cycle Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model relates to a direct current explosion-proof machine, a serial communication port, include: the motor casing, with control box, motor front end housing, the motor middle-end connection lid, pump, the motor that the motor casing is connected, the pump with be equipped with connecting screw between the motor, the motor front end housing is located the motor front end, pump, motor are used for connecting the motor casing with the control box, pump, motor pass through the electricity and connect, the control box is equipped with the driver. Adopt integrated circuit board to go to control motor operation through hall sensor to reach the motor and just pass the reversal, integrated circuit board embeds the relay, but the spark that inside digestion storage battery clip produced replaces traditional carbon brush, the steerable motor temperature of integrated circuit board's function, and the motor is just reversing, improves motor life, when the motor temperature reaches and predetermines the operating temperature threshold value, but self-power-off, after motor temperature cooling is from the back, but normal use is not influenced in automatic operation.
Description
Technical Field
The utility model relates to the technical field of electric machines, more specifically say, relate to a direct current explosion proof machine.
Background
Traditional direct current motor adopts the carbon brush to start, can produce the spark and the motor easily sends out when the motor starts and scalds, can take place to burn the condition such as motor to can not work for a long time, the carbon brush replacement cycle is four months. Thus, frequent replacement of carbon brushes is costly.
Thus, significant advances in the art are needed.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the foretell defect of prior art, provide a direct current explosion-proof machine, include: the motor casing, with control box, motor front end housing, the motor middle-end connection lid, pump, the motor that the motor casing is connected, the pump with be equipped with connecting screw between the motor, the motor front end housing is located the motor front end, pump, motor are used for connecting the motor casing with the control box, pump, motor pass through the electricity and connect, the control box is equipped with the driver.
The dc explosion-proof motor of the present invention is characterized in that the motor casing and the control box body are fixedly connected by screw threads.
DC explosion-proof machine in, the motor middle-end connection lid is equipped with the screw hole, the screw hole be used for with the motor casing is connected.
The DC explosion-proof motor of the present invention is characterized in that the motor middle end cover is connected with the motor front end cover by a screw thread.
In the dc explosion-proof motor of the present invention, the pump and the front end cover of the motor use clearance fit.
In the dc explosion-proof motor, the pump and the motor front end cover use the threaded rod to carry out threaded connection.
The dc explosion-proof motor of the present invention, wherein the driver is provided with a power control module and a driving control module.
DC explosion-proof machine in, drive control module is equipped with rotary switch, hall sensor, rotary switch carries out inching contact to positive and negative controller control through installing in the stator on the motor hall sensor control the motor is just reversing.
DC explosion proof machine in, drive control module is equipped with the temperature-sensing ware, the temperature-sensing ware is used for detecting motor operating temperature, when motor operating temperature reaches and predetermines the operating temperature threshold value, drive control module control DC explosion proof machine stops the function.
In the dc explosion-proof machine of the present invention, the preset working temperature threshold is 60-80 degrees.
Implement the utility model discloses a direct current explosion-proof machine has following beneficial effect: the direct-reverse rotation of the motor is controlled by adopting a point-action contact through a rotary switch and a positive-reverse controller arranged in a coil stator and a Hall sensor fed back to an integrated circuit board, a relay is arranged in the integrated circuit board, sparks generated by a battery clamp are digested inside the integrated circuit board, and the effect of replacing the traditional carbon brush is achieved; the temperature sensor in the integrated circuit board can monitor the temperature of the motor, when the temperature of the motor reaches 70 ℃, the temperature sensor and the controller of the integrated circuit board control the motor to be powered off, and after the temperature of the motor is cooled, the motor can automatically operate without influencing normal use and prolong the service life of the motor.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic diagram of a driver of a dc explosion-proof motor according to the present invention.
Fig. 2 is a control schematic diagram of the dc explosion-proof motor of the present invention.
Fig. 3 is a signal flow diagram of the dc explosion-proof motor of the present invention.
Detailed Description
A brushless dc motor is a type of synchronous motor, i.e. the rotational speed of the rotor of the motor is influenced by the speed of the rotating magnetic field of the stator of the motor and the number of poles (P) of the rotor: and N is 120 f/P, wherein P is the pole pair number, f is the frequency of 50Hz, and N is the rotating speed of the motor rotor. Under the condition of fixed number of poles of the rotor, the rotating speed of the rotor can be changed by changing the frequency of the rotating magnetic field of the stator. The brushless dc motor is a synchronous motor with an electronic control (driver) to control the frequency of the rotating magnetic field of the stator and feed back the rotation speed of the rotor of the motor to the control center for repeated correction, so as to achieve a mode close to the characteristics of the dc motor. That is to say, the dc brushless motor can control the motor rotor to maintain a certain rotation speed when the load changes within the rated load range.
Fig. 1 is a schematic diagram of a driver of a dc explosion-proof motor according to the present invention. The utility model discloses in the direct current explosion-proof machine that the first embodiment provided, include at least, the motor casing, the control box body of being connected with the motor casing, motor front end housing, motor middle-end connection lid, pump, motor are equipped with connecting screw between pump and the motor, and the motor front end is located to the motor front end housing, and pump, motor are used for connecting motor casing and control box body, pump, motor pass through the electricity and connect, and the control box body is equipped with the driver. The motor casing and the control box body are fixedly connected by screw threads. The motor middle end connecting cover is provided with a threaded hole, and the threaded hole is used for being connected with the motor shell. The end cover uses threaded connection with the motor front end housing in the motor. The pump and the front end cover of the motor are in clearance fit. The pump and the front end cover of the motor are in threaded connection by using a threaded rod. The driver is provided with a power supply control module and a drive control module. The drive control module is provided with a rotary switch and a Hall sensor, the rotary switch is in inching contact, and the Hall sensor is controlled by a positive and negative controller arranged in a stator on the motor to control the positive and negative rotation of the motor. The drive control module is provided with a temperature sensor, the temperature sensor is used for detecting the working temperature of the motor, and when the working temperature of the motor reaches a preset working temperature threshold value, the drive control module controls the direct-current explosion-proof motor to stop operating. The preset working temperature threshold value is 60-80 degrees. The preset operating temperature threshold is preferably 70 degrees as in the present embodiment. Referring to fig. 1, the power control module provides a three-phase power to the dc explosion-proof motor, and the driving control module converts the input power frequency according to the requirement. The power control module can directly input with direct current (generally 24V) or with alternating current (110V/220V), if the input is alternating current, the input is converted into direct current through a converter (converter). Before the direct current input or the alternating current input is transferred to the motor coil, the direct current voltage is converted into 3-phase voltage by an inverter to drive the motor. The inverter (inverter) is generally divided into upper arms (Q1, Q3, Q5)/lower arms (Q2, Q4, Q6) by 6 power transistors (Q1-Q6) and connected with the motor as switches for controlling the current flowing through the motor coil. The drive control module provides PWM to determine the switching frequency of the power transistor and the time of phase change of the inverter. In general, a brushless dc motor is required to be controlled at a speed that is stable at a set value without changing too much when a load changes, so that a hall-sensor (hall-sensor) that can sense a magnetic field is installed inside the motor as a basis for closed-loop control of the speed and phase-sequence control. But this is only used for speed control and not for positioning control.
Fig. 2 is a control schematic diagram of the dc explosion-proof motor of the present invention. Referring to fig. 2, to rotate the motor, the driving control module firstly determines the current position of the rotor of the motor according to the hall-sensor, and then determines the sequence of turning on (or turning off) the power transistors in the inverter (inverter) according to the winding of the stator, such as AH, BH, CH (these are called upper arm power transistors) and AL, BL, CL (these are called lower arm power transistors) in the inverter in fig. 2, so that the current flows through the coil of the motor in sequence to generate a forward (or reverse) rotating magnetic field, and interacts with the magnet of the rotor, thereby enabling the motor to rotate in a forward/reverse direction. When the motor rotor rotates to a position where the hall-sensor senses another group of signals, the drive control module starts the next group of power transistors again, so that the circulating motor can continue to rotate in the same direction until the drive control module determines that the motor rotor stops, and the power transistors are turned off (or only the lower arm power transistors are turned on); the power transistor is turned on in the opposite order when the motor rotor is reversed.
The switching on of the basic power transistor can be exemplified as follows: AH. BL → AH, CL → BH, AL → CH, BL, but never AH, AL or BH, BL or CH, CL. In addition, because the electronic components always have the response time of the switch, the response time of the components is taken into account by the staggered time of the switch and the switch of the power transistor, otherwise, when the upper arm (or the lower arm) is not completely switched off, the lower arm (or the upper arm) is switched on, and as a result, the upper arm and the lower arm are short-circuited to burn the power transistor.
When the motor rotates, the driving control module compares (or is calculated by software) the Command (Command) composed of the speed and the acceleration/deceleration rate set by the driver with the changing speed of the hall-sensor signal to determine the next group (AH, BL or AH, CL or BH, CL or … …) of switches to be turned on and the turn-on time. When the speed is not enough, the switch is opened long, and when the speed is over, the switch is shortened, and the part of the work is completed by PWM. PWM is a method for determining the speed of the motor, and how to generate such PWM is the core of achieving more precise speed control. The high speed control must consider whether the CLOCK resolution of the system is sufficient to handle the time for processing the software instructions, and the data access for hall-sensor signal changes also affects processor performance and decision accuracy and real-time performance. For low-speed control, especially for low-speed starting, it is important how to retrieve the signal mode, the processing time and to appropriately configure the control parameter values according to the motor characteristics, since the returned hall-sensor signal changes more slowly. Or the speed feedback change is based on the encoder change, so that the signal resolution is increased to obtain better control. The motor can operate smoothly and respond well, and the P.I.D. control is not proper or not neglected. It was mentioned before that the dc brushless motor is closed loop control, so the feedback signal is equal to telling the drive control module how much the motor speed is now different from the target speed, which is the Error (Error). Knowing the error, it is compensated by conventional engineering controls such as p.i.d. control.
Fig. 3 is a signal flow diagram of the dc explosion-proof motor of the present invention. As shown in fig. 3, the knob inputs a signal, and the signal is controlled by the motor, then is driven by the motor, is converted into a direct current, and then passes through the current converter to reach the brushless direct current motor.
The utility model discloses a design of above embodiment, its beneficial technological effect is: the direct-reverse rotation of the motor is controlled by adopting a point-action contact through a rotary switch and a positive-reverse controller arranged in a coil stator and a Hall sensor fed back to an integrated circuit board, a relay is arranged in the integrated circuit board, sparks generated by a battery clamp are digested inside the integrated circuit board, and the effect of replacing the traditional carbon brush is achieved; the temperature sensor in the integrated circuit board can monitor the temperature of the motor, when the temperature of the motor reaches 70 ℃, the temperature sensor and the controller of the integrated circuit board control the motor to be powered off, and after the temperature of the motor is cooled, the motor can automatically operate without influencing normal use and prolong the service life of the motor.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention. Furthermore, to adapt to the particular situation of the technology of the present invention, it is possible to make numerous modifications to the present invention without departing from its scope of protection. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. A DC explosion-proof motor, characterized by comprising: the motor casing, with control box, motor front end housing, the motor middle-end connection lid, pump, the motor that the motor casing is connected, the pump with be equipped with connecting screw between the motor, the motor front end housing is located the motor front end, pump, motor are used for connecting the motor casing with the control box, pump, motor pass through the electricity and connect, the control box is equipped with the driver.
2. The direct-current explosion-proof motor according to claim 1, wherein the motor case is fixedly connected with the control box body by using a screw thread.
3. The direct-current explosion-proof motor according to claim 1, wherein the motor middle end connection cover is provided with a threaded hole for connecting with the motor casing.
4. The direct-current explosion-proof motor according to claim 1, wherein the motor middle end cover is connected with the motor front end cover by using threads.
5. The explosion-proof direct current motor of claim 1 wherein the pump uses a clearance fit with the motor front end cap.
6. The explosion-proof motor of direct current of claim 5, wherein the pump is screwed with the motor front end cover using a threaded rod.
7. The direct-current explosion-proof motor according to claim 1, wherein the driver is provided with a power supply control module and a driving control module.
8. The direct-current explosion-proof motor according to claim 7, wherein the drive control module is provided with a rotary switch and a Hall sensor, the rotary switch is in inching contact, and the Hall sensor is controlled by a positive and negative controller in a stator mounted on the motor to control the positive and negative rotation of the motor.
9. The direct-current explosion-proof motor according to claim 7, wherein the driving control module is provided with a temperature sensor for detecting the operating temperature of the motor, and when the operating temperature of the motor reaches a preset operating temperature threshold, the driving control module controls the direct-current explosion-proof motor to stop operating.
10. The dc explosion-proof motor of claim 9, wherein the preset operating temperature threshold is 60-80 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020300236.8U CN211351904U (en) | 2020-03-12 | 2020-03-12 | Direct current explosion-proof motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020300236.8U CN211351904U (en) | 2020-03-12 | 2020-03-12 | Direct current explosion-proof motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211351904U true CN211351904U (en) | 2020-08-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020300236.8U Active CN211351904U (en) | 2020-03-12 | 2020-03-12 | Direct current explosion-proof motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211351904U (en) |
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2020
- 2020-03-12 CN CN202020300236.8U patent/CN211351904U/en active Active
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Address after: 325000 No.7, Lane 33, central street, Mei'ao village, qiaoxia Town, Yongjia County, Wenzhou City, Zhejiang Province Patentee after: Wenzhou Haiwan PUMP Co.,Ltd. Country or region after: China Address before: 325000 No.7, Lane 33, central street, Mei'ao village, qiaoxia Town, Yongjia County, Wenzhou City, Zhejiang Province Patentee before: WENZHOU HAIWAN PUMP Co.,Ltd. Country or region before: China |