CN204666793U - A kind of operational parameter detection circuit of being located in direct current permanent magnetic brushless motor - Google Patents
A kind of operational parameter detection circuit of being located in direct current permanent magnetic brushless motor Download PDFInfo
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- CN204666793U CN204666793U CN201520395239.3U CN201520395239U CN204666793U CN 204666793 U CN204666793 U CN 204666793U CN 201520395239 U CN201520395239 U CN 201520395239U CN 204666793 U CN204666793 U CN 204666793U
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Abstract
The utility model discloses a kind of operational parameter detection circuit being located in direct current permanent magnetic brushless motor, comprise angle and rotation speed detection unit, current of electric detecting unit, temperature detecting unit in motor, wireless communication unit and single-chip microcomputer, angle and rotation speed detection unit, current of electric detecting unit, in motor, the output of temperature detecting unit is connected with single-chip microcomputer respectively, single-chip microcomputer is also communicated with remote terminal by wireless communication unit, angle and rotation speed detection unit, current of electric detecting unit, temperature detecting unit in motor, wireless communication unit and single-chip microcomputer are integrated on a circuit board, circuit board is embedded in the inside of direct current permanent magnetic brushless motor. the machine operation parameter of the electric current of the utility model motor in real time, corner, rotating speed, temperature, and by wireless communication module, the machine operation parameter collecting is sent to remote terminal, be not subject to the interference that changes high-intensity magnetic field in motor, have a good application prospect.
Description
Technical field
The utility model relates to a kind of operational parameter detection circuit being located in direct current permanent magnetic brushless motor, belongs to current of electric detection technique field.
Background technology
At present, the current detection circuit of motor commonly adopts Hall current sample circuit to realize, and first by current signal process electromagnetic conversion, becomes d. c. voltage signal and exports; Deliver to A/D converter circuit again to sample. Also having a kind of mode to realize the current detecting of motor, is by current transformer, and the curent change of front end is delivered to rear class by electromagnetic induction, then carries out sample circuit,
Two kinds of above-mentioned circuit are subject to external electromagnetic field interference, and especially under high-intensity magnetic field interference environment, the sampled voltage of its output has often superposeed interfering signal, can not the tested end current value of accurate response, cause the current detecting accuracy of motor low.
In track transportation industry, the running status of compartment accelerator control system need to be monitored, especially the running status of the door motor of car door switch is controlled, door motor is AC permanent magnet direct current generator, wherein, temperature in electric current, corner, rotating speed and the motor of door motor is all the whether normal important parameter of reflection door motor operation. At present, conventionally the method adopting is that parameter acquisition circuit is placed on to door motor, and carried out data transmission by RS485 or other wire communication port, temperature door motor in during this kind of mode, cannot be collected, duty that door motor current truly can not be reflected.
Utility model content
The purpose of this utility model is to overcome the existing parameter acquisition circuit that is placed on motor, temperature door motor in cannot be collected, and under high-intensity magnetic field interference environment, the sampled voltage of its output has often superposeed interfering signal, can not the tested end current value of accurate response, cause the current detecting accuracy of motor low, can not truly reflect the current duty of door motor problem. The operational parameter detection circuit that is located in direct current permanent magnetic brushless motor of the present utility model, parameter of electric machine Acquisition Circuit is built in motor internal collection, the machine operation parameter of the electric current of motor in real time, corner, rotating speed, temperature, and by wireless communication module, the machine operation parameter collecting is sent to remote terminal, realize the running status of Real-Time Monitoring motor, be not subject to the interference that changes high-intensity magnetic field in motor, have a good application prospect.
In order to achieve the above object, the technical solution adopted in the utility model is:
A kind of operational parameter detection circuit of being located in direct current permanent magnetic brushless motor, it is characterized in that: comprise angle and rotation speed detection unit, current of electric detecting unit, temperature detecting unit in motor, wireless communication unit and single-chip microcomputer, described angle and rotation speed detection unit, current of electric detecting unit, in motor, the output of temperature detecting unit is connected with single-chip microcomputer respectively, described single-chip microcomputer is also communicated with remote terminal by wireless communication unit, described angle and rotation speed detection unit, current of electric detecting unit, temperature detecting unit in motor, wireless communication unit and single-chip microcomputer are integrated on a circuit board, described circuit board is embedded in the inside of direct current permanent magnetic brushless motor,
Described angle and rotation speed detection unit, comprise three hall position sensors, the corner distances such as three hall position sensors are around being arranged on the turning cylinder of motor, and the pulse signal signal output part of three hall position sensors is connected with the pulse collection interface of single-chip microcomputer respectively;
Described current of electric detecting unit, comprise accurate sampling resistor, isolated amplifier circuit, in the current path of described accurate sampling resistor serial connection motor, the input of described isolated amplifier circuit is connected in parallel on the two ends of accurate sampling resistor, and the output of described isolated amplifier circuit is connected with the AD conversion interface in single-chip microcomputer;
Temperature detecting unit in described motor, comprise digital temperature sensor, the temperature sense end of described digital temperature sensor is attached in the coil windings of motor, and the output of described digital temperature sensor is connected with the IO port of single-chip microcomputer by monobus;
The input of described wireless communication unit is connected with single-chip microcomputer by serial communication unit, and output and the remote terminal of described wireless communication unit carry out radio communication.
The aforesaid operational parameter detection circuit that is located in direct current permanent magnetic brushless motor, it is characterized in that: described accurate sampling resistor is the accurate sampling resistor of milliohm level, the gain error of described isolated amplifier circuit is between ± 1%, and described isolated amplifier circuit has the fast response time of 200KHz bandwidth sum 1.6 μ s.
The aforesaid operational parameter detection circuit that is located in direct current permanent magnetic brushless motor, it is characterized in that: the sampling side of described isolated amplifier circuit is connected with insulating power supply, the output voltage of described insulating power supply is 5V.
The aforesaid operational parameter detection circuit that is located in direct current permanent magnetic brushless motor, is characterized in that: described digital temperature sensor is DS18B20 digital temperature sensor.
The aforesaid operational parameter detection circuit that is located in direct current permanent magnetic brushless motor, is characterized in that: described wireless communication unit is 470MHz short distance communication module or wireless wifi communication module.
The beneficial effects of the utility model are: the operational parameter detection circuit that is located in direct current permanent magnetic brushless motor of the present utility model, parameter of electric machine Acquisition Circuit is built in motor internal collection, the machine operation parameter of the electric current of motor in real time, corner, rotating speed, temperature, and by wireless communication module, the machine operation parameter collecting is sent to remote terminal, realize the running status of Real-Time Monitoring motor, be not subject to the interference that changes high-intensity magnetic field in motor, have a good application prospect.
Accompanying drawing explanation
Fig. 1 is the system block diagram that the utility model is located at the operational parameter detection circuit in direct current permanent magnetic brushless motor.
Fig. 2 is the system block diagram of singlechip minimum system circuit of the present utility model.
Fig. 3 is the cut-away view of isolated amplifier circuit of the present utility model.
Fig. 4 is the circuit diagram of current of electric detecting unit of the present utility model.
Fig. 5 is the circuit diagram of digital temperature sensor of the present utility model. .
Detailed description of the invention
Below in conjunction with Figure of description, the utility model is described in further detail. Following examples only for the technical solution of the utility model is clearly described, and can not limit protection domain of the present utility model with this.
As shown in Figure 1, the operational parameter detection circuit that is located in direct current permanent magnetic brushless motor of the present utility model, comprise angle and rotation speed detection unit, current of electric detecting unit, temperature detecting unit in motor, wireless communication unit and single-chip microcomputer, described angle and rotation speed detection unit, current of electric detecting unit, in motor, the output of temperature detecting unit is connected with single-chip microcomputer respectively, described single-chip microcomputer is also communicated with remote terminal by wireless communication unit, described angle and rotation speed detection unit, current of electric detecting unit, temperature detecting unit in motor, wireless communication unit and single-chip microcomputer are integrated on a circuit board, described circuit board is embedded in the inside of direct current permanent magnetic brushless motor,
Described angle and rotation speed detection unit, comprise three hall position sensors, the corner distances such as three hall position sensors are around being arranged on the turning cylinder of motor, and the pulse signal signal output part of three hall position sensors is connected with the pulse collection interface of single-chip microcomputer respectively;
Described current of electric detecting unit, comprise accurate sampling resistor, isolated amplifier circuit, in the current path of described accurate sampling resistor serial connection motor, the input of described isolated amplifier circuit is connected in parallel on the two ends of accurate sampling resistor, and the output of described isolated amplifier circuit is connected with the AD conversion interface in single-chip microcomputer.
Temperature detecting unit in described motor, comprise digital temperature sensor, the temperature sense end of described digital temperature sensor is attached in the coil windings of motor, and the output of described digital temperature sensor is disconnected by monobus being connected with the IO port of single-chip microcomputer;
The input of described wireless communication unit is connected with single-chip microcomputer by serial communication unit, and output and the remote terminal of described wireless communication unit carry out radio communication.
As shown in Figure 2, single-chip microcomputer is selected the minimum system circuit of the M4 MCU of TI, MCU comprises AD conversion interface, pulse collection interface, serial communication interface, storage chip and single bus interface, and wherein AD conversion interface is connected with the output of current of electric detecting unit; Pulse collection interface is connected with hall position sensor output in angle and rotation speed detection unit; Serial communication interface and Wireless Transmission Communication Modules interface; Single bus interface is connected with the output of the digital temperature sensor of temperature detecting unit in motor; Storage chip collects the running parameter of motor and the configuration parameter of MCU for storage backup.
Described accurate sampling resistor is the accurate sampling resistor of milliohm level, the gain error of described isolated amplifier circuit is between ± 1%, the sampling side of isolated amplifier circuit is connected with insulating power supply, the output voltage of insulating power supply is 5V, insulating power supply can be realized the signal to noise ratio dynamic property of also excellent linearity and 60 decibels, isolated amplifier provides good isolation mode noise inhibiting ability, step-down imbalance, embody good accuracy and stability, cut-away view, as shown in Figure 3, and, this isolated amplifier circuit has the fast response time of 200KHz bandwidth sum 1.6 μ s, this circuit can be caught the current transients under short circuit and overload situations, the circuit diagram of described current of electric detecting unit, as shown in Figure 4, the model of isolated amplifier chip is ACPL-C790X or ACPL-C79B.
Described digital temperature sensor is DS18B20 digital temperature sensor, for single wire bus device, have circuit simple, the feature that volume is little, therefore forms a temp measuring system with it, there is circuit simple, at an order wire, very convenient, measuring tempeature scope is between-55.C to+125.C, connecting circuit figure with MCU, as shown in Figure 5.
Described wireless communication unit is 470MHz short distance communication module or wireless wifi communication module, the utility model is selected 470MHz short distance communication module, 470MHz communication module is operated in the metering frequency range of exempting from application, can not have an impact to miscellaneous equipment, and module communication distance can realize the function of remote monitoring. The application of this module only need provide 5V power supply and module supporting antenna, serial communication is passed through between module and single-chip microcomputer, realize transparent transmission, after module powers on, single-chip microcomputer can be realized transparent transmission function after it being initialized by serial ports, and single-chip microcomputer can be carried out exchanges data by serial ports and other 470MHz wireless device.
Based on the above-mentioned operational parameter detection method that is located at the operational parameter detection circuit in direct current permanent magnetic brushless motor, comprise the following steps,
Step (1), is integrated in temperature detecting unit, wireless communication unit and single-chip microcomputer in angle and rotation speed detection unit, current of electric detecting unit, motor on a circuit board, and circuit board is arranged in direct current permanent magnetic brushless motor to be detected;
Step (2), by the corner such as three hall position sensors of angle and rotation speed detection unit distance around being arranged on the turning cylinder of motor, the accurate sampling resistor of current of electric detecting unit is connected in the current path of motor, the temperature sense end of the digital temperature sensor of temperature detecting unit in motor is attached in the coil windings of motor;
Step (3), direct current permanent magnetic brushless motor carries out work, by the corner of temperature detecting unit to direct current permanent magnetic brushless motor in angle and rotation speed detection unit, current of electric detecting unit, motor, rotating speed, electric current, internal temperature carries out Real-time Collection, and the data that collect are transferred to single-chip microcomputer
Its medium speed, carries out the method for Real-time Collection, comprises the following steps,
(1) three hall position sensor includes position sensor stator and position sensor rotor, the main rotor of position sensor rotor and direct current permanent magnetic brushless motor together rotates, for gathering the position signalling of direct current permanent magnetic brushless motor main rotor, the position signalling of three road direct current permanent magnetic brushless motor main rotors can be gathered;
(2) corresponding position signalling is converted to pulse signal and issues single-chip microcomputer by position sensor stator, forms three road pulse signals and issues single-chip microcomputer;
(3) single-chip microcomputer is according to the time of advent of three road pulse signals, calculates the corner value of direct current permanent magnetic brushless motor, tachometer value;
The method of current acquisition, comprises the following steps,
(1) the accurate sampling resistor of current of electric detecting unit is connected in the current path of motor, current signal is converted to current sample voltage signal by accurate sampling resistor, and is input to isolated amplifier;
(2) after current sample voltage signal amplifies by isolated amplifier, output voltage is input to the AD conversion interface of single-chip microcomputer, isolated amplifier can by input ± 0.3V voltage isolation is amplified to the output voltage of 0 ~ 2.5V, its sampling voltage input and output are isolated, need power respectively with the power supply of isolation, isolated amplifier could normally be worked, this current acquisition is not common Hall current sampling A/D chip, so still can be interference-free in high-intensity magnetic field changing environment in motor, normally accurately carry out current sample;
(3) single-chip microcomputer is according to the voltage acquisition signal of AD conversion interface, calculates the current value of direct current permanent magnetic brushless motor;
Step (4), single-chip microcomputer is processed the data that collect, and obtains the running parameter of direct current permanent magnetic brushless motor, comprises real-time corner value, tachometer value, torque value, current value, the temperature value of motor;
Step (5), single-chip microcomputer, by the running parameter of the direct current permanent magnetic brushless motor obtaining, is sent to remote terminal by wireless communication unit, and remote terminal, for long-range real time rendering, is realized remote detection.
In sum, the operational parameter detection circuit that is located in direct current permanent magnetic brushless motor of the present utility model, parameter of electric machine Acquisition Circuit is built in motor internal collection, the machine operation parameter of the electric current of motor in real time, corner, rotating speed, temperature, and by wireless communication module, the machine operation parameter collecting is sent to remote terminal, realize the running status of Real-Time Monitoring motor, be not subject to the interference that changes high-intensity magnetic field in motor, change monitoring in the past to need, manually to the on-the-spot situation gathering, to have a good application prospect.
More than show and depict general principle of the present utility model, principal character and advantage. The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; what in above-described embodiment and description, describe just illustrates principle of the present utility model; under the prerequisite that does not depart from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model. The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (5)
1. one kind is located at the operational parameter detection circuit in direct current permanent magnetic brushless motor, it is characterized in that: comprise angle and rotation speed detection unit, current of electric detecting unit, temperature detecting unit in motor, wireless communication unit and single-chip microcomputer, described angle and rotation speed detection unit, current of electric detecting unit, in motor, the output of temperature detecting unit is connected with single-chip microcomputer respectively, described single-chip microcomputer is also communicated with remote terminal by wireless communication unit, described angle and rotation speed detection unit, current of electric detecting unit, temperature detecting unit in motor, wireless communication unit and single-chip microcomputer are integrated on a circuit board, described circuit board is embedded in the inside of direct current permanent magnetic brushless motor,
Described angle and rotation speed detection unit, comprise three hall position sensors, the corner distances such as three hall position sensors are around being arranged on the turning cylinder of motor, and the pulse signal signal output part of three hall position sensors is connected with the pulse collection interface of single-chip microcomputer respectively;
Described current of electric detecting unit, comprise accurate sampling resistor, isolated amplifier circuit, in the current path of described accurate sampling resistor serial connection motor, the input of described isolated amplifier circuit is connected in parallel on the two ends of accurate sampling resistor, and the output of described isolated amplifier circuit is connected with the AD conversion interface in single-chip microcomputer;
Temperature detecting unit in described motor, comprise digital temperature sensor, the temperature sense end of described digital temperature sensor is attached in the coil windings of motor, and the output of described digital temperature sensor is connected with the IO port of single-chip microcomputer by monobus;
The input of described wireless communication unit is connected with single-chip microcomputer by serial communication unit, and output and the remote terminal of described wireless communication unit carry out radio communication.
2. the operational parameter detection circuit that is located in direct current permanent magnetic brushless motor according to claim 1, it is characterized in that: described accurate sampling resistor is the accurate sampling resistor of milliohm level, the gain error of described isolated amplifier circuit is between ± 1%, and described isolated amplifier circuit has the fast response time of 200KHz bandwidth sum 1.6 μ s.
3. the operational parameter detection circuit that is located in direct current permanent magnetic brushless motor according to claim 1 and 2, it is characterized in that: the sampling side of described isolated amplifier circuit is connected with insulating power supply, the output voltage of described insulating power supply is 5V.
4. the operational parameter detection circuit that is located in direct current permanent magnetic brushless motor according to claim 1, is characterized in that: described digital temperature sensor is DS18B20 digital temperature sensor.
5. the operational parameter detection circuit that is located in direct current permanent magnetic brushless motor according to claim 1, is characterized in that: described wireless communication unit is 470MHz short distance communication module or wireless wifi communication module.
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| CN201520395239.3U CN204666793U (en) | 2015-06-10 | 2015-06-10 | A kind of operational parameter detection circuit of being located in direct current permanent magnetic brushless motor |
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| CN201520395239.3U CN204666793U (en) | 2015-06-10 | 2015-06-10 | A kind of operational parameter detection circuit of being located in direct current permanent magnetic brushless motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104865526A (en) * | 2015-06-10 | 2015-08-26 | 南京康尼机电股份有限公司 | Operating parameter detection circuit arranged in DC permanent magnetic brushless motor and method thereof |
| CN109581218A (en) * | 2018-11-13 | 2019-04-05 | 德尔康(上海)运动用品有限公司 | Motor operation monitoring method, system and device |
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2015
- 2015-06-10 CN CN201520395239.3U patent/CN204666793U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104865526A (en) * | 2015-06-10 | 2015-08-26 | 南京康尼机电股份有限公司 | Operating parameter detection circuit arranged in DC permanent magnetic brushless motor and method thereof |
| CN109581218A (en) * | 2018-11-13 | 2019-04-05 | 德尔康(上海)运动用品有限公司 | Motor operation monitoring method, system and device |
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