CN113394905A - Direct current explosion-proof motor - Google Patents
Direct current explosion-proof motor Download PDFInfo
- Publication number
- CN113394905A CN113394905A CN202010168928.6A CN202010168928A CN113394905A CN 113394905 A CN113394905 A CN 113394905A CN 202010168928 A CN202010168928 A CN 202010168928A CN 113394905 A CN113394905 A CN 113394905A
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- Prior art keywords
- motor
- proof
- explosion
- pump
- direct
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- 230000005611 electricity Effects 0.000 claims abstract description 3
- 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 description 2
- 230000029087 digestion Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method 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
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design 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
- 238000012545 processing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
- H02K5/136—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas explosion-proof
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
- H02H7/0852—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load directly responsive to abnormal temperature by using a temperature sensor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/25—Devices for sensing temperature, or actuated thereby
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/33—Drive circuits, e.g. power electronics
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention relates to a direct current explosion-proof motor, which is characterized by comprising the following components: 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 invention relates to the technical field of motors, in particular to a direct-current explosion-proof motor.
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.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a dc explosion-proof motor, which includes: 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.
In the direct-current explosion-proof motor, the motor shell is fixedly connected with the control box body through the screw threads.
In the direct current explosion-proof motor, the middle end connecting cover of the motor is provided with a threaded hole, and the threaded hole is used for being connected with the motor shell.
In the direct-current explosion-proof motor, the middle end cover of the motor is connected with the front end cover of the motor through threads.
In the direct-current explosion-proof motor, the pump is in clearance fit with a front end cover of the motor.
In the direct-current explosion-proof motor, the pump is in threaded connection with the front end cover of the motor by using the threaded rod.
In the direct current explosion-proof motor, the driver is provided with a power supply control module and a drive control module.
In the direct-current explosion-proof motor, 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.
In the direct-current explosion-proof motor, the drive control module is provided with a temperature sensor 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.
In the direct current explosion-proof motor, the preset working temperature threshold is 60-80 ℃.
The direct-current explosion-proof motor has the following beneficial effects: 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-sensing ware in the integrated circuit board can monitor motor temperature, and when motor temperature reached 70 degrees, the temperature-sensing ware through the integrated circuit board and controller control realized motor self-power-off, and at motor temperature cooling from the back, but the beneficial effect that normal use is not influenced and extension motor life can be run automatically.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
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 a dc explosion-proof motor according to the present invention.
Fig. 3 is a signal flow diagram of a dc explosion-proof motor according to 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 dc brushless motor is a synchronous motor with an electronic control (driver) to control the frequency of the stator rotating magnetic field and feed back the rotation speed of the motor rotor to the control center for repeated correction, so as to achieve a way approaching the dc motor characteristics. 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 direct-current explosion-proof motor provided by the first embodiment of the invention at least comprises a motor shell, a control box body connected with the motor shell, a motor front end cover, a motor middle end connecting cover, a pump and a motor, wherein a connecting screw rod is arranged between the pump and the motor, the motor front end cover is arranged at the front end of the motor, the pump and the motor are used for connecting the motor shell and the control box body, the pump and the motor are electrically connected, and the control box body is provided with a 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 the screw thread to be connected 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 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, a power control module provides a three-phase power to a dc explosion-proof motor of the present invention, and a driving control module converts the frequency of an input power according to the requirement. The power control module can directly input direct current (generally 24V) or alternating current (110V/220V), and 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 a large variation when a load varies, and therefore, 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 as a speed control and not as a positioning control.
Fig. 2 is a control schematic diagram of a dc explosion-proof motor according to 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 the 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 response time of the switch, the staggered time of the switch and the switch of the power transistor takes the response time of the components into account, 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 out 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 speed is increased, and when the speed is over, the speed is decreased, 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 take into account whether the CLOCK resolution of the system is sufficient to handle the time required to process the software instructions, and the data access to the hall-sensor signal variations also affects processor performance and decision accuracy and real-time performance. For the low speed control, especially for the low speed start, since the change of the returned hall-sensor signal becomes slower, it is very important how to capture the signal mode, the processing time and properly configure the control parameter values according to the motor characteristics. 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 is mentioned before that the dc brushless motor is a closed loop control, so the feedback signal is equal to telling the driving control module how much the current motor speed is 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.
Through the design of the above embodiment, the beneficial technical effects of the invention are as follows: the direct-reverse rotation of the motor is controlled by adopting a rotary switch to perform point-action contact, a direct-reverse controller arranged in a coil stator is used for feeding back to a Hall sensor of an integrated circuit board, a relay is arranged in the integrated circuit board, sparks generated by a clamp of a storage battery are digested inside the integrated circuit board, and the effect of replacing a 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 self-power-off of the motor, 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. In addition, many modifications may be made to adapt a particular situation to the teachings of the invention without departing from the essential scope thereof. 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 8, wherein the preset operating temperature threshold is 60 degrees to 80 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010168928.6A CN113394905A (en) | 2020-03-12 | 2020-03-12 | Direct current explosion-proof motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010168928.6A CN113394905A (en) | 2020-03-12 | 2020-03-12 | Direct current explosion-proof motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113394905A true CN113394905A (en) | 2021-09-14 |
Family
ID=77615621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010168928.6A Pending CN113394905A (en) | 2020-03-12 | 2020-03-12 | Direct current explosion-proof motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113394905A (en) |
-
2020
- 2020-03-12 CN CN202010168928.6A patent/CN113394905A/en active Pending
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Country or region after: China Address after: 325000 No.7, Lane 33, central street, Mei'ao village, qiaoxia Town, Yongjia County, Wenzhou City, Zhejiang Province Applicant after: Wenzhou Haiwan PUMP Co.,Ltd. Address before: 325000 No.7, Lane 33, central street, Mei'ao village, qiaoxia Town, Yongjia County, Wenzhou City, Zhejiang Province Applicant before: WENZHOU HAIWAN PUMP Co.,Ltd. Country or region before: China |
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| CB02 | Change of applicant information |