CN204789760U - Measure circuit and motor excess temperature protection circuit of internal resistance of electric motor rotor coil - Google Patents
Measure circuit and motor excess temperature protection circuit of internal resistance of electric motor rotor coil Download PDFInfo
- Publication number
- CN204789760U CN204789760U CN201520461663.3U CN201520461663U CN204789760U CN 204789760 U CN204789760 U CN 204789760U CN 201520461663 U CN201520461663 U CN 201520461663U CN 204789760 U CN204789760 U CN 204789760U
- Authority
- CN
- China
- Prior art keywords
- motor
- resistance
- module
- sampling module
- electrically connected
- 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
Landscapes
- Control Of Direct Current Motors (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The utility model provides a measure the circuit of electric motor rotor coil internal resistance, through addding in motor -drive circuit plus the voltage sample module, host system, the motor back electromotive force module of sampling, and the sampling parameter of the applied voltage gathered respectively of motor current sample module, the sampling parameter of motor electric current, the sampling parameter that reaches motor back electromotive force calculates the applied voltage of motor respectively, the motor electric current, and motor back electromotive force, again according to the applied voltage of motor, motor back electromotive force, and the real -time accurate electric motor rotor coil internal resistance that calculates of the voltage balance equation formula of motor current conveyance motor, need not change the assembly structure of motor. Furthermore, the utility model also provides a motor excess temperature protection circuit is through electric motor rotor coil internal resistance real -time calculation electric motor rotor coil temperature to when electric motor rotor coil high temperature, the control motor auto -stop can prevent effectively that the motor from burning out because of the high temperature.
Description
Technical field
The utility model relates to technical field of motors, particularly relates to a kind of circuit and the motor thermal-shutdown circuit of measuring motor-spin-coil internal resistance.
Background technology
Along with the paces of socio-economic development are accelerated, all trades and professions all change with rapid changepl. never-ending changes and improvements.Various electric equipment is developed, and applies in various occasion.Wherein, motor becomes key equipment, has been widely used in numerous occasion.Motor (being commonly called as " motor ") refers to a kind of calutron realizing electric energy conversion according to the law of electromagnetic induction or transmit.Its Main Function produces driving torque, as the power source of electrical appliance or various machinery.
Motor operationally, an electric energy part is converted into mechanical energy and exports, and a part is converted into heat energy, and heat is propagated in air or in other media by motor material, if the amount of heat that motor continuous firing produces accumulates to a certain degree, motor just has may by what burn.Burnt to prevent motor; need to carry out overheat protector to motor, traditional motor excess temperature protection method is that bimetallic strip is assemblied on motor, detects motor temperature; when motor temperature is too high, bimetallic strip contact disconnects; motor is quit work, protects motor, this method detected temperatures point is single; Standard is complicated; and because there is the problem of heat trnasfer, so bimetallic strip is slow in one's movements, metrical error is large.
In order to improve above-mentioned traditional motor excess temperature protection method; propose a kind of resistance by measuring coil of stator of motor; and then obtain the temperature of stator coil; the temperature of motor is judged by the temperature of stator coil; overheat protector is carried out to motor; the method is only applicable to the motor that stator is coil, and is not suitable for the motor that stator is permanent magnet, and the scope of application has limitation.In addition, be assemblied on coil of stator of motor in addition, by the resistance of thermistor, judge the method for stator coil temperature by thermistor, the method needs to increase thermistor, also needs respective outer side edges to install, adds cost of manufacture.
Summary of the invention
First the purpose of this utility model is to provide a kind of circuit measuring motor-spin-coil internal resistance, under the prerequisite not changing motor assembling structure, can measure the motor-spin-coil internal resistance in machine operation process in real time accurately.
The purpose of this utility model is also to provide a kind of motor thermal-shutdown circuit, can obtain motor-spin-coil temperature in real time according to rotor internal resistance, to carry out overheat protector to motor, prevents motor Yin Wendu too high and burns out.
For achieving the above object, first the utility model provides a kind of circuit measuring motor-spin-coil internal resistance, comprising: impressed voltage sampling module, switch control module, main control module, counter electromotive force of motor sampling module, motor module, current of electric sampling module and impressed voltage module;
Described switch control module, motor module and current of electric sampling module are electrically connected at the two ends of impressed voltage module after connecting successively;
Described impressed voltage sampling module is parallel to the two ends of impressed voltage module;
Described counter electromotive force of motor sampling module is parallel to the motor module of described series connection and the two ends of current of electric sampling module;
Described impressed voltage sampling module, switch control module, current of electric sampling module and counter electromotive force of motor sampling module are all electrically connected at described main control module.
Described impressed voltage sampling module is resistor voltage divider circuit, and described counter electromotive force of motor sampling module is resistor voltage divider circuit, and described current of electric sampling module comprises a sampling resistor.
Described impressed voltage sampling module is resistor voltage divider circuit, and described counter electromotive force of motor sampling module is resistor voltage divider circuit, and described current of electric sampling module comprises a current transformer.
Described impressed voltage sampling module comprises: the first resistance and the second resistance; Described switch control module comprises: the first metal-oxide-semiconductor and driver; Described main control module is a single-chip microcomputer; Described counter electromotive force of motor sampling module comprises: the 4th resistance and the 5th resistance; Described motor module comprises: motor and the first diode; Described current of electric sampling module comprises: the 3rd resistance; Described impressed voltage module comprises: direct supply and electrochemical capacitor;
The positive pole of described electrochemical capacitor is electrically connected at the positive pole of direct supply and one end of the first resistance, and negative pole is electrically connected at one end of one end of the second resistance, one end of the 3rd resistance and the 5th resistance;
The other end of described first resistance and the other end of described second resistance and single-chip microcomputer are electrically connected;
The grid of described first metal-oxide-semiconductor is electrically connected at driver, and source electrode is electrically connected at one end and the driver of the first resistance, and drain electrode is electrically connected at the negative pole of the first diode;
Described driver and single-chip microcomputer are electrically connected;
One end of described motor is electrically connected at the negative pole of the first diode, and the other end is electrically connected at the positive pole of the first diode;
The described other end of the 3rd resistance and the other end of motor and single-chip microcomputer are electrically connected;
Described one end of 4th resistance and one end of motor are electrically connected, and the other end is electrically connected at the other end and the single-chip microcomputer of the 5th resistance.
Described motor is direct current generator.
The utility model also provides a kind of motor thermal-shutdown circuit, comprising: impressed voltage sampling module, switch control module, main control module, counter electromotive force of motor sampling module, motor module, current of electric sampling module and impressed voltage module;
Described switch control module, motor module and current of electric sampling module are electrically connected at the two ends of impressed voltage module after connecting successively;
Described impressed voltage sampling module is parallel to the two ends of impressed voltage module;
Described counter electromotive force of motor sampling module is parallel to the motor module of described series connection and the two ends of current of electric sampling module;
Described impressed voltage sampling module, current of electric sampling module, counter electromotive force of motor sampling module and switch control module are all electrically connected at described main control module.
Described impressed voltage sampling module is resistor voltage divider circuit, and described counter electromotive force of motor sampling module is resistor voltage divider circuit, and described current of electric sampling module comprises a sampling resistor.
Described impressed voltage sampling module is resistor voltage divider circuit, and described counter electromotive force of motor sampling module is resistor voltage divider circuit, and described current of electric sampling module comprises a current transformer.
Described impressed voltage sampling module comprises: the first resistance and the second resistance; Described switch control module comprises: the first metal-oxide-semiconductor and driver; Described main control module is a single-chip microcomputer; Described counter electromotive force of motor sampling module comprises: the 4th resistance and the 5th resistance; Described motor module comprises: motor and the first diode; Described current of electric sampling module comprises: the 3rd resistance; Described impressed voltage module comprises: direct supply and electrochemical capacitor;
The positive pole of described electrochemical capacitor is electrically connected at the positive pole of direct supply and one end of the first resistance, and negative pole is electrically connected at one end of one end of the second resistance, one end of the 3rd resistance and the 5th resistance;
The other end of described first resistance and the other end of described second resistance and single-chip microcomputer are electrically connected;
The grid of described first metal-oxide-semiconductor is electrically connected at driver, and source electrode is electrically connected at one end and the driver of the first resistance, and drain electrode is electrically connected at the negative pole of the first diode;
Described driver and single-chip microcomputer are electrically connected;
One end of described motor is electrically connected at the negative pole of the first diode, and the other end is electrically connected at the positive pole of the first diode;
The described other end of the 3rd resistance and the other end of motor and single-chip microcomputer are electrically connected;
Described one end of 4th resistance and one end of motor are electrically connected, and the other end is electrically connected at the other end and the single-chip microcomputer of the 5th resistance.
Described motor is direct current generator.
The beneficial effects of the utility model: the utility model provides a kind of circuit measuring motor-spin-coil internal resistance, by setting up impressed voltage sampling module in motor-drive circuit, main control module, counter electromotive force of motor sampling module, and current of electric sampling module, according to impressed voltage sampling module, current of electric sampling module, and the sampling parameter of impressed voltage that counter electromotive force of motor sampling module collects respectively, the sampling parameter of current of electric, and the sampling parameter of counter electromotive force of motor calculates the impressed voltage of motor respectively, current of electric, and counter electromotive force of motor, again according to the impressed voltage of motor, counter electromotive force of motor, and current of electric calculates motor-spin-coil internal resistance in real time accurately by the voltage balance equation of motor, do not need the assembly structure changing motor.Further; the utility model additionally provides a kind of motor thermal-shutdown circuit, calculates motor-spin-coil temperature in real time by motor-spin-coil internal resistance, and when motor-spin-coil temperature is too high; control motor auto stop, motor Yin Wendu effectively can be prevented too high and burn out.
In order to further understand feature of the present utility model and technology contents, refer to following about detailed description of the present utility model and accompanying drawing, but accompanying drawing only provide reference and explanation use, is not used for being limited the utility model.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, by describing in detail embodiment of the present utility model, will make the technical solution of the utility model and other beneficial effect apparent.
In accompanying drawing,
Fig. 1 is the circuit of measurement motor-spin-coil of the present utility model internal resistance and the module frames figure of motor thermal-shutdown circuit;
Fig. 2 is the circuit of measurement motor-spin-coil of the present utility model internal resistance and the circuit diagram of motor thermal-shutdown circuit.
Embodiment
For further setting forth the technological means and effect thereof that the utility model takes, be described in detail below in conjunction with preferred embodiment of the present utility model and accompanying drawing thereof.
Refer to Fig. 1, first the utility model provides a kind of circuit measuring motor-spin-coil internal resistance, comprising: impressed voltage sampling module 1, switch control module 2, main control module 3, counter electromotive force of motor sampling module 4, motor module 5, current of electric sampling module 6 and impressed voltage module 7;
Described switch control module 2, motor module 5 and current of electric sampling module 6 are electrically connected at the two ends of impressed voltage module 7 after connecting successively; Described impressed voltage sampling module 1 is parallel to the two ends of impressed voltage module 7; Described counter electromotive force of motor sampling module 4 is parallel to the motor module 5 of described series connection and the two ends of current of electric sampling module 6; Described impressed voltage sampling module 1, switch control module 2, current of electric sampling module 6 and counter electromotive force of motor sampling module 4 are electrically connected at described main control module 3.
Particularly, refer to Fig. 2, Fig. 2 is preferred embodiment of the present utility model, and described impressed voltage sampling module 1 adopts resistor voltage divider circuit, comprising: the first resistance R1 of series connection and the second resistance R2.Same, described counter electromotive force of motor sampling module 4 also adopts resistor voltage divider circuit, comprising: the 4th resistance R4 of series connection and the 5th resistance R5.Described current of electric sampling module 6 comprises a sampling resistor, and described sampling resistor is the 3rd resistance R3.
In addition, described switch control module 2 comprises: the first metal-oxide-semiconductor MOS1 and driver Q1; Described main control module 3 is a single-chip microprocessor MCU; Described in described counter electromotive force of motor sampling module 4, motor module 5 comprises: motor M 1 and the first diode D1; Described impressed voltage module 7 comprises: direct supply U and electrochemical capacitor C1.
As shown in Figure 2, concrete annexation between each element above-mentioned is: the positive pole of described electrochemical capacitor C1 is electrically connected at the positive pole of direct supply U and one end of the first resistance R1, and negative pole is electrically connected at one end of one end of the second resistance R2, one end of the 3rd resistance R3 and the 5th resistance R5; The other end of described first resistance R1 and the other end of described second resistance R2 and single-chip microprocessor MCU are electrically connected; The grid of described first metal-oxide-semiconductor MOS1 is electrically connected at driver Q1, and source electrode is electrically connected at one end and the driver Q1 of the first resistance R1, and drain electrode is electrically connected at the negative pole of the first diode D1; Driver Q1 is electrically connected to single-chip microprocessor MCU; One end of described motor M 1 is electrically connected at the negative pole of the first diode D1, and the other end is electrically connected at the positive pole of the first diode D1; The described other end of the 3rd resistance R3 and the other end of motor M 1 and single-chip microprocessor MCU are electrically connected; Described one end of 4th resistance R4 and one end of motor M 1 are electrically connected, and the other end is electrically connected at the other end and the single-chip microprocessor MCU of the 5th resistance R5.
The course of work of the preferred embodiment of the present utility model shown in Fig. 2 is: first, single-chip microprocessor MCU in described main control module 3 sends signal, the driver Q1 in switch control module 2 is made to control the first metal-oxide-semiconductor MOS1 conducting, motor M 1 is energized work, described impressed voltage sampling module 1 obtains the sampling parameter i.e. voltage at the second resistance R2 two ends of impressed voltage by single-chip microprocessor MCU, described current of electric sampling module 6 obtains the sampling parameter i.e. voltage at the 3rd resistance R3 two ends of current of electric by single-chip microprocessor MCU, next, of short duration disconnection first metal-oxide-semiconductor MOS1, the impressed voltage at motor M 1 two ends is disappeared, now counter electromotive force of motor is applied in the 4th of series connection the, 5th resistance R4, R5 two ends, single-chip microprocessor MCU gathers the sampling parameter E1 of voltage as counter electromotive force of motor at the 5th resistance R5 two ends, then, monolithic MCU is respectively according to formula (1), (2), (3) impressed voltage is calculated, counter electromotive force of motor, and current of electric, wherein, the formula (1) calculating impressed voltage is:
V＝V1×(r1+r2)/r2，(1)
Wherein, the size of the voltage swing that V applies for direct supply U and impressed voltage, V1 is the sampling parameter i.e. voltage at the second resistance R2 two ends of impressed voltage, and r1 is the resistance of the first resistance R1, and r2 is the resistance of the second resistance R2;
The formula (2) calculating counter electromotive force of motor is:
E＝E1×(r4+r5)/r5，(2)
Wherein E is counter electromotive force of motor, and E1 is the sampling parameter i.e. voltage at the 5th resistance R5 two ends of counter electromotive force of motor, and r4 is the resistance of the 4th resistance R4, and r5 is the resistance of the 5th resistance R5.
The formula (3) calculating current of electric is:
Ia＝Va/r3，(3)
Wherein Ia is current of electric, and Va is the sampling parameter i.e. voltage at the 3rd resistance R3 two ends of current of electric, and r3 is the resistance of the 3rd resistance R3.
Finally, described single-chip microprocessor MCU calculates motor-spin-coil internal resistance according to formula (4), and described formula (4) obtains according to the voltage balance equation conversion of motor:
Ra＝(V-E)/Ia，(4)
Wherein Ra is motor-spin-coil internal resistance, and V is impressed voltage, and E is counter electromotive force of motor, and Ia is current of electric, can measure motor-spin-coil internal resistance accurately in real time.
It is worth mentioning that; in preferred embodiment of the present utility model as shown in Figure 2; first diode D1 is parallel to the two ends of motor M 1; for at motor M 1 shutdown transient protection circuit from impact; electrochemical capacitor C1 is used for carrying out filtering to the direct current that DC voltage U provides, to provide a more galvanic current.Described current of electric sampling module 6 Current Transformer can also replace the collection that sampling resistor carries out current of electric sampling parameter.
In addition, as Fig. 1, circuit shown in Fig. 2 can also be used as motor thermal-shutdown circuit, the course of work of this motor thermal-shutdown circuit is except needing the course of work through the internal resistance of above-mentioned measurement motor-spin-coil to obtain motor-spin-coil internal resistance Ra, also comprise the resistivity calculating motor-spin-coil according to motor-spin-coil internal resistance Ra, formula is: ρ=Ra × S/L, wherein ρ is the resistivity of motor-spin-coil, Ra is motor-spin-coil internal resistance, S is the wire cross-section area of motor-spin-coil, L is the overall length of the wire of motor-spin-coil, and then calculate motor-spin-coil temperature according to the electricalresistivityρ of motor-spin-coil, formula is: t=(ρ-ρ 0)/(ρ 0 × α), wherein t is motor-spin-coil temperature, ρ 0 is the resistivity of the material of motor-spin-coil when motor-spin-coil temperature is zero degree, α is the temperature-coefficient of electrical resistance of the material of motor-spin-coil, last according to motor-spin-coil temperature t, judge that whether the temperature of motor is too high, if motor temperature is too high, then disconnect the first metal-oxide-semiconductor MOS1 by single-chip microprocessor MCU control and drive system Q1, motor M 1 power-off is shut down, reach and prevent motor temperature too high and the object burnt out.
In addition; the motor that stator is coil can only be applied to compared to prior art; because motor excess temperature protection method of the present utility model judges motor-spin-coil temperature by motor-spin-coil internal resistance, thus the utility model can also be applied to stator is permanent magnet, and rotor is the motor of coil.
In sum, the utility model provides a kind of circuit measuring motor-spin-coil internal resistance, by setting up impressed voltage sampling module in motor-drive circuit, main control module, counter electromotive force of motor sampling module, and current of electric sampling module, according to impressed voltage sampling module, current of electric sampling module, and the sampling parameter of impressed voltage that counter electromotive force of motor sampling module collects respectively, the sampling parameter of current of electric, and the sampling parameter of counter electromotive force of motor calculates the impressed voltage of motor respectively, current of electric, and counter electromotive force of motor, again according to the impressed voltage of motor, counter electromotive force of motor, and current of electric calculates motor-spin-coil internal resistance in real time accurately by the voltage balance equation of motor, do not need the assembly structure changing motor.Further; the utility model additionally provides a kind of motor thermal-shutdown circuit, calculates motor-spin-coil temperature in real time by motor-spin-coil internal resistance, and when motor-spin-coil temperature is too high; control motor auto stop, motor Yin Wendu effectively can be prevented too high and burn out.
The above; for the person of ordinary skill of the art; can make other various corresponding change and distortion according to the technical solution of the utility model and technical conceive, and all these change and be out of shape the protection domain that all should belong to the utility model claim.
Claims (10)
1. measure the circuit of motor-spin-coil internal resistance for one kind, it is characterized in that, comprising: impressed voltage sampling module (1), switch control module (2), main control module (3), counter electromotive force of motor sampling module (4), motor module (5), current of electric sampling module (6) and impressed voltage module (7);
Described switch control module (2), motor module (5) and current of electric sampling module (6) are electrically connected at the two ends of impressed voltage module (7) after connecting successively;
Described impressed voltage sampling module (1) is parallel to the two ends of impressed voltage module (7);
Described counter electromotive force of motor sampling module (4) is parallel to the motor module (5) of described series connection and the two ends of current of electric sampling module (6);
Described impressed voltage sampling module (1), switch control module (2), current of electric sampling module (6) and counter electromotive force of motor sampling module (4) are all electrically connected at described main control module (3).
2. the circuit measuring motor-spin-coil internal resistance as claimed in claim 1, it is characterized in that, described impressed voltage sampling module (1) is resistor voltage divider circuit, described counter electromotive force of motor sampling module (4) is resistor voltage divider circuit, and described current of electric sampling module (6) comprises a sampling resistor.
3. the circuit measuring motor-spin-coil internal resistance as claimed in claim 1, it is characterized in that, described impressed voltage sampling module (1) is resistor voltage divider circuit, described counter electromotive force of motor sampling module (4) is resistor voltage divider circuit, and described current of electric sampling module (6) comprises a current transformer.
4. the circuit measuring motor-spin-coil internal resistance as claimed in claim 1, it is characterized in that, described impressed voltage sampling module (1) comprising: the first resistance (R1) and the second resistance (R2); Described switch control module (2) comprising: the first metal-oxide-semiconductor (MOS1) and driver (Q1); Described main control module (3) is a single-chip microcomputer (MCU); Described counter electromotive force of motor sampling module (4) comprising: the 4th resistance (R4) and the 5th resistance (R5); Described motor module (5) comprising: motor (M1) and the first diode (D1); Described current of electric sampling module (6) comprising: the 3rd resistance (R3); Described impressed voltage module (7) comprising: direct supply (U) and electrochemical capacitor (C1);
The positive pole of described electrochemical capacitor (C1) is electrically connected at the positive pole of direct supply (U) and one end of the first resistance (R1), and negative pole is electrically connected at one end of one end of the second resistance (R2), one end of the 3rd resistance (R3) and the 5th resistance (R5);
The other end of described first resistance (R1) and the other end of described second resistance (R2) and single-chip microcomputer (MCU) are electrically connected;
The grid of described first metal-oxide-semiconductor (MOS1) is electrically connected at driver (Q1), source electrode is electrically connected at one end and the driver (Q1) of the first resistance (R1), and drain electrode is electrically connected at the negative pole of the first diode (D1);
Described driver (Q1) and single-chip microcomputer (MCU) are electrically connected;
One end of described motor (M1) is electrically connected at the negative pole of the first diode (D1), and the other end is electrically connected at the positive pole of the first diode (D1);
The described other end of the 3rd resistance (R3) and the other end of motor (M1) and single-chip microcomputer (MCU) are electrically connected;
Described one end of 4th resistance (R4) and one end of motor (M1) are electrically connected, and the other end is electrically connected at the other end and the single-chip microcomputer (MCU) of the 5th resistance (R5).
5. the circuit measuring motor-spin-coil internal resistance as claimed in claim 4, it is characterized in that, described motor (M1) is direct current generator.
6. a motor thermal-shutdown circuit, it is characterized in that, comprising: impressed voltage sampling module (1), switch control module (2), main control module (3), counter electromotive force of motor sampling module (4), motor module (5), current of electric sampling module (6) and impressed voltage module (7);
Described switch control module (2), motor module (5) and current of electric sampling module (6) are electrically connected at the two ends of impressed voltage module (7) after connecting successively;
Described impressed voltage sampling module (1) is parallel to the two ends of impressed voltage module (7);
Described counter electromotive force of motor sampling module (4) is parallel to the motor module (5) of described series connection and the two ends of current of electric sampling module (6);
Described impressed voltage sampling module (1), current of electric sampling module (6), counter electromotive force of motor sampling module (4) and switch control module (2) are all electrically connected at described main control module (3).
7. motor thermal-shutdown circuit as claimed in claim 6; it is characterized in that; described impressed voltage sampling module (1) is resistor voltage divider circuit; described counter electromotive force of motor sampling module (4) is resistor voltage divider circuit, and described current of electric sampling module (6) comprises a sampling resistor.
8. motor thermal-shutdown circuit as claimed in claim 6; it is characterized in that; described impressed voltage sampling module (1) is resistor voltage divider circuit; described counter electromotive force of motor sampling module (4) is resistor voltage divider circuit, and described current of electric sampling module (6) comprises a current transformer.
9. motor thermal-shutdown circuit as claimed in claim 6, it is characterized in that, described impressed voltage sampling module (1) comprising: the first resistance (R1) and the second resistance (R2); Described switch control module (2) comprising: the first metal-oxide-semiconductor (MOS1) and driver (Q1); Described main control module (3) is a single-chip microcomputer (MCU); Described counter electromotive force of motor sampling module (4) comprising: the 4th resistance (R4) and the 5th resistance (R5); Described motor module (5) comprising: motor (M1) and the first diode (D1); Described current of electric sampling module (6) comprising: the 3rd resistance (R3); Described impressed voltage module (7) comprising: direct supply (U) and electrochemical capacitor (C1);
The positive pole of described electrochemical capacitor (C1) is electrically connected at the positive pole of direct supply (U) and one end of the first resistance (R1), and negative pole is electrically connected at one end of one end of the second resistance (R2), one end of the 3rd resistance (R3) and the 5th resistance (R5);
The other end of described first resistance (R1) and the other end of described second resistance (R2) and single-chip microcomputer (MCU) are electrically connected;
The grid of described first metal-oxide-semiconductor (MOS1) is electrically connected at driver (Q1), source electrode is electrically connected at one end and the driver (Q1) of the first resistance (R1), and drain electrode is electrically connected at the negative pole of the first diode (D1);
Described driver (Q1) and single-chip microcomputer (MCU) are electrically connected;
One end of described motor (M1) is electrically connected at the negative pole of the first diode (D1), and the other end is electrically connected at the positive pole of the first diode (D1);
The described other end of the 3rd resistance (R3) and the other end of motor (M1) and single-chip microcomputer (MCU) are electrically connected;
Described one end of 4th resistance (R4) and one end of motor (M1) are electrically connected, and the other end is electrically connected at the other end and the single-chip microcomputer (MCU) of the 5th resistance (R5).
10. motor thermal-shutdown circuit as claimed in claim 9, it is characterized in that, described motor (M1) is direct current generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520461663.3U CN204789760U (en) | 2015-06-30 | 2015-06-30 | Measure circuit and motor excess temperature protection circuit of internal resistance of electric motor rotor coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520461663.3U CN204789760U (en) | 2015-06-30 | 2015-06-30 | Measure circuit and motor excess temperature protection circuit of internal resistance of electric motor rotor coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204789760U true CN204789760U (en) | 2015-11-18 |
Family
ID=54529777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520461663.3U Active CN204789760U (en) | 2015-06-30 | 2015-06-30 | Measure circuit and motor excess temperature protection circuit of internal resistance of electric motor rotor coil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204789760U (en) |
-
2015
- 2015-06-30 CN CN201520461663.3U patent/CN204789760U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105717451B (en) | Pumping unit and pumping unit permanent magnet motor no-load back electromotive force measurement method, device | |
| CN104569607A (en) | Direct current insulation monitoring method and device | |
| CN107323306A (en) | Motor fan-out capability computational methods | |
| WO2019184581A1 (en) | Method, device and system for measuring efficiency of vehicle electrical motor controller | |
| CN110125857A (en) | A kind of rotation angle of torque Multidimensional Awareness control device and method for electric wrench | |
| CN201450311U (en) | Temperature control circuit of motor | |
| CN204789760U (en) | Measure circuit and motor excess temperature protection circuit of internal resistance of electric motor rotor coil | |
| CN104965126A (en) | Method used for measuring motor rotor coil internal resistance and motor overtemperature protection method | |
| CN115765325A (en) | Motor and electric appliance | |
| CN204425122U (en) | For the on-line checkingi structure of permanent magnet synchronous motor rotor magnetic steel temperature | |
| CN105243249A (en) | Three-phase induction motor transient temperature rise calculation model and measuring calculation method | |
| CN109696581B (en) | Insulation resistance detection circuit of power battery and control method thereof | |
| CN100487998C (en) | Digital type thermal protection method for electromotor | |
| CN204615365U (en) | A kind of permagnetic synchronous motor back electromotive force protective device | |
| CN206259456U (en) | A kind of novel battery bag with communication function | |
| CN107480098B (en) | Motor loss calculation method under non-sinusoidal input condition | |
| CN207879647U (en) | A kind of permanent air quantity blower fan applied to wall-hung boiler | |
| CN204333926U (en) | A kind of current foldback circuit of D.C. electric drill | |
| CN208272880U (en) | Electric machine controller circuit | |
| CN207967918U (en) | Heat protector of motor timing test device | |
| CN102720684A (en) | Speed governing exhaust fan controller | |
| CN205649394U (en) | Prevent dry combustion method circuit | |
| CN109462359A (en) | A kind of current-limiting protection controller of motor | |
| CN205752341U (en) | A kind of electric automobile is by battery core multiloop grading control battery bag | |
| CN205453421U (en) | Inside temperature -detecting device of motor for elevator door motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |