CN105572584A - Isolation monitoring system for bus voltage of brushless direct-current motor - Google Patents
Isolation monitoring system for bus voltage of brushless direct-current motor Download PDFInfo
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- CN105572584A CN105572584A CN201410542283.2A CN201410542283A CN105572584A CN 105572584 A CN105572584 A CN 105572584A CN 201410542283 A CN201410542283 A CN 201410542283A CN 105572584 A CN105572584 A CN 105572584A
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Abstract
Disclosed in the invention is an isolation monitoring system for a bus voltage of a brushless direct-current motor. The system is composed of a first signal operation amplifier conditioning circuit, a second signal operation amplifier conditioning circuit, an AD device and a control unit. The input terminal of the first signal operation amplifier conditioning circuit is connected with a bus of a brushless direct-current motor and the output terminal is connected with the input terminal of the second signal operation amplifier conditioning circuit; the output terminal of the second signal operation amplifier conditioning circuit is connected with the input terminal of the AD device; and the output terminal of the AD device is connected with the input terminal of the control unit. The first signal operation amplifier conditioning circuit and the second signal operation amplifier conditioning circuit carry out voltage sampling signal processing to inhibit the influence on voltage detection by clutters; the processed voltage sampling signal is inputted into the control unit, so that the bus voltage can be monitored in real time. Therefore, a real-time monitoring problem of a power supply voltage of a turbine can be solved; and the complete description of a working state of a turbine is perfected.
Description
Technical field
The present invention relates to a kind of observation circuit, especially a kind of brshless DC motor busbar voltage isolation monitoring system.
Background technology
Brshless DC motor has been widely used in many fields.Brshless DC motor is used to drive turbine to be the air feed such as Anesthesia machine or lung ventilator in medical industry, not only significantly can reduce the volume of source of the gas, save the energy, reduce costs, can also control accurately and reliably turbine, thus obtain stable air-flow and pressure.
The operating voltage of turbine is generally 24V, can be operated in 18V time supply voltage is lower.Along with the reduction of supply voltage, power supply can be supplied to the power reduction of turbine, and the rotating speed of turbine is declined, and the flow velocity of output gas flow also declines, and this just needs ventilation control program to carry out judgement speed governing.Turbine is also a typical inductive load, and under higher MOSFET drives commutation frequency, the telefault in turbine will produce higher back electromotive force, especially obvious when turbine carries out speed governing suddenly.If turbine rotates with maximal rate in an unloaded situation, the back electromotive force of generation can reach voltage value.If turbine is braked, peak point current can be 2 times of Rated motor electric current.The electromagnet phenomenon of these two kinds of exceptions all likely enters into other current return, causes the impact that cannot estimate.
Existing Anesthesia machine or lung ventilator, when designing, ignore the Real-Time Monitoring to turbine power supply, have lacked the complete description to turbo operating state.
Summary of the invention
The object of the present invention is to provide a kind of brshless DC motor busbar voltage to isolate monitoring system, solve the Real-Time Monitoring problem to turbine supply voltage, the perfect complete description to turbo operating state.
The object of the invention is to be achieved through the following technical solutions: a kind of brshless DC motor busbar voltage isolation monitoring system, comprises the first signal amplifier modulate circuit, secondary signal amplifier modulate circuit, AD device and control module; The input end of the first signal amplifier modulate circuit connects the bus of brshless DC motor, and output terminal connects the input end of secondary signal amplifier modulate circuit; The output terminal of secondary signal amplifier modulate circuit connects the input end of AD device; The input end of the output terminal connection control unit of AD device, main control unit can select PLC, single-chip microcomputer and CPU etc.
Further, also comprise isolation amplifier circuit, the output terminal of described first signal amplifier modulate circuit connects the input end of isolation amplifier circuit; The output terminal of isolation amplifier circuit connects the input end of secondary signal amplifier modulate circuit.
Further, described first signal amplifier modulate circuit comprises sampling resistor, the first transient voltage suppressor diode, the first electric capacity and the first amplifier, the bus of described sampling resistor one termination brshless DC motor, other end ground connection; Described first transient voltage suppressor diode and the first electric capacity all in parallel with sampling resistor; The positive input terminal of termination first amplifier that described sampling resistor is connected with the negative pole of the first transient voltage suppressor diode; The 4th resistance is in series with, the 4th resistance and the second Capacitance parallel connection between the output terminal of the first amplifier and negative input end.
Further, one end of termination first resistance of described sampling resistor, another termination bus of the first resistance.
Further, one end of output termination the 3rd resistance of the first amplifier, the input end of another termination isolation amplifier circuit of the 3rd resistance.
Further, described isolation amplifier circuit comprises the second Transient Suppression Diode, the tenth resistance, the 3rd electric capacity, the 11 electric capacity and isolation amplifier; The input end of isolation amplifier is connected with the output terminal of the first amplifier; The input end of isolation amplifier is connected with the negative pole of the second transient voltage suppressor diode, the plus earth of the second transient voltage suppressor diode; The input end of isolation amplifier is connected with one end of the tenth resistance, and the other end of the tenth resistance connects one end of the 11 electric capacity, the other end ground connection of the 11 electric capacity; The input end of isolation amplifier is connected with one end of the 3rd electric capacity, the other end ground connection of the 3rd electric capacity; The output terminal of isolation amplifier connects the input end of secondary signal amplifier modulate circuit.
Further, described secondary signal amplifier modulate circuit comprises the 3rd amplifier, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the 8th electric capacity, the 9th electric capacity and the tenth electric capacity; One end of 5th resistance connects the output terminal of isolation amplifier, and the other end of the 5th resistance connects one end of the 6th resistance, the negative input end of another termination the 3rd amplifier of the 6th resistance, the positive input terminal ground connection of the 3rd amplifier; The input end of the output termination AD device of the 3rd resistance; One end of output termination the 9th electric capacity of the 3rd amplifier, the negative input end of another termination the 3rd amplifier of the 9th electric capacity; One end of output termination the 8th resistance of the 3rd amplifier, the other end of the 8th resistance connects the two ends that the 5th resistance is connected with the 6th resistance respectively, and the other end of the 8th resistance is also connected with one end of the 8th electric capacity, the other end ground connection of the 8th electric capacity.
Further, also comprise insulating power supply circuit, for powering for the first signal amplifier modulate circuit and isolation amplifier circuit.
Further, the positive voltage output end of described insulating power supply circuit connects the positive voltage input end of the first signal amplifier modulate circuit, and the positive voltage output valve of insulating power supply circuit is 12 volts; The negative voltage output terminal of described insulating power supply circuit connects the negative voltage input end of the first signal amplifier modulate circuit, and the negative voltage output valve of insulating power supply circuit is-12 volts.
Further, the positive voltage output end of described insulating power supply circuit connects the positive voltage input end of isolation amplifier circuit, and the positive voltage output valve of insulating power supply circuit is 12 volts; The negative voltage output terminal of described insulating power supply circuit connects the negative voltage input end of isolation amplifier circuit, and the negative voltage output valve of insulating power supply circuit is-12 volts.
The invention has the beneficial effects as follows and adopt said system to monitor the busbar voltage of brshless DC motor, two ends first transient voltage suppressor diode in parallel of the sampling resistor of the first signal amplifier modulate circuit, protection subsequent conditioning circuit does not damage by the impact of the instantaneous high pressure of bus; And the first electric capacity in parallel at the two ends of sampling resistor, the clutter in filtering voltage; Resistance in 3rd amplifier and peripheral circuit and electric capacity composition second-order low-pass filter, inhibit the noise in voltage acquisition signal Vs, makes the voltage signal inputing to AD device measure accurately; Main control unit is the programming device with high-speed computational capability, can monitor the voltage signal of input in real time, the perfect complete description to turbo operating state.
Accompanying drawing explanation
Fig. 1 is the hardware block diagram of brshless DC motor busbar voltage of the present invention isolation monitoring system;
Fig. 2 is the circuit theory diagrams of the first signal amplifier modulate circuit of brshless DC motor busbar voltage of the present invention isolation monitoring system;
Fig. 3 is the circuit theory diagrams of the metering circuit of brshless DC motor busbar voltage of the present invention isolation monitoring system.
Embodiment
Technical scheme of the present invention is further illustrated by embodiment below in conjunction with accompanying drawing.
Fig. 1 is the hardware block diagram of a kind of brshless DC motor busbar voltage isolation monitoring system.
As shown in Figure 1, a kind of hardware block diagram of brshless DC motor busbar voltage isolation monitoring system, comprises the first signal amplifier modulate circuit 3, secondary signal amplifier modulate circuit 5, AD device 6 and control module 7; The input end of the first signal amplifier modulate circuit 3 connects the bus of brshless DC motor 1, and output terminal connects the input end of secondary signal amplifier modulate circuit 5; The output terminal of secondary signal amplifier modulate circuit 5 connects the input end of AD device 6; The input end of the output terminal connection control unit 7 of AD device 6.Wherein, control module 7 can be the chips such as PLC, single-chip microcomputer or CPU.Bus voltage signal Us inputs the first signal amplifier modulate circuit 3 filtering clutter and obtains busbar voltage collection signal Vs, reduces clutter to the impact of follow-up measurement.Secondary signal amplifier modulate circuit 5 is second-order low-pass filters, plays the effect suppressing noise in busbar voltage collection signal Vs, makes the sampled voltage signal measurement finally exporting AD device 6 to accurate.
Also comprise isolation amplifier circuit 4, the output terminal of described first signal amplifier modulate circuit 3 connects the input end of isolation amplifier circuit 4, and the output terminal of isolation amplifier circuit 4 connects the input end of secondary signal amplifier modulate circuit 5.The isolation amplifier circuit 4 connected between the first signal amplifier modulate circuit 3 and secondary signal amplifier modulate circuit 5, by busbar voltage collection signal Vs and AD device isolation, plays the effect of electric protection.
Also comprise insulating power supply circuit 2, for powering for the first signal amplifier modulate circuit 3 and isolation amplifier circuit 4.
The positive voltage output end of described insulating power supply circuit 2 connects the positive voltage input end of the first signal amplifier modulate circuit 3, and the positive voltage output valve of insulating power supply circuit 2 is 12 volts; The negative voltage output terminal of described insulating power supply circuit 2 connects the negative voltage input end of the first signal amplifier modulate circuit 3, and the negative voltage output valve of insulating power supply circuit 2 is-12 volts.
The positive voltage output end of described insulating power supply circuit 2 connects the positive voltage input end of isolation amplifier circuit 4, and the positive voltage output valve of insulating power supply circuit 4 is 12 volts; The negative voltage output terminal of described insulating power supply circuit 4 connects the negative voltage input end of isolation amplifier circuit 4, and the negative voltage output valve of insulating power supply circuit 4 is-12 volts.
As shown in Figure 2, wherein the first signal amplifier modulate circuit comprises sampling resistor, the first transient voltage suppressor diode, the first electric capacity and the first amplifier, the bus of described sampling resistor one termination brshless DC motor, other end ground connection; Described first transient voltage suppressor diode and the first electric capacity all in parallel with sampling resistor; The positive input terminal of termination first amplifier that described sampling resistor is connected with the negative pole of the first transient voltage suppressor diode; The 4th resistance is in series with, the 4th resistance and the second Capacitance parallel connection between the output terminal of the first amplifier and negative input end.One end of one termination first resistance of sampling resistor, another termination bus of the first resistance.One end of output termination the 3rd resistance of the first amplifier, the input end of another termination isolation amplifier circuit of the 3rd resistance.Two ends first transient voltage suppressor diode in parallel of sampling resistor, protection subsequent conditioning circuit does not damage by the impact of the instantaneous high pressure of bus; And the first electric capacity in parallel at the two ends of sampling resistor, the clutter in filtering voltage.
As shown in Figure 3, the metering circuit of brshless DC motor busbar voltage isolation monitoring system comprises isolation amplifier circuit and secondary signal amplifier modulate circuit.Wherein, isolation amplifier circuit comprises the second Transient Suppression Diode, the tenth resistance, the 3rd electric capacity, the 11 electric capacity and isolation amplifier; The input end of isolation amplifier is connected with the output terminal of the first amplifier; The input end of isolation amplifier is connected with the negative pole of the second transient voltage suppressor diode, the plus earth of the second transient voltage suppressor diode; The input end of isolation amplifier is connected with one end of the tenth resistance, and the other end of the tenth resistance connects one end of the 11 electric capacity, the other end ground connection of the 11 electric capacity; The input end of isolation amplifier is connected with one end of the 3rd electric capacity, the other end ground connection of the 3rd electric capacity; The output terminal of isolation amplifier connects the input end of secondary signal amplifier modulate circuit.Isolation amplifier circuit is by voltage acquisition signal Vs and AD device isolation; play the effect of electric protection; second transient voltage suppressor diode, the tenth resistance and the 11 electric capacity composition input protection electronic circuit in isolation amplifier circuit, prevents high voltage from entering isolation amplifier simultaneously.
Secondary signal amplifier modulate circuit comprises the 3rd amplifier, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the 8th electric capacity, the 9th electric capacity and the tenth electric capacity; One end of 5th resistance connects the output terminal of isolation amplifier, and the other end of the 5th resistance connects one end of the 6th resistance, the negative input end of another termination the 3rd amplifier of the 6th resistance, the positive input terminal ground connection of the 3rd amplifier; The input end of the output termination AD device of the 3rd resistance; One end of output termination the 9th electric capacity of the 3rd amplifier, the negative input end of another termination the 3rd amplifier of the 9th electric capacity; One end of output termination the 8th resistance of the 3rd amplifier, the other end of the 8th resistance connects the two ends that the 5th resistance is connected with the 6th resistance respectively, and the other end of the 8th resistance is also connected with one end of the 8th electric capacity, the other end ground connection of the 8th electric capacity.
On one embodiment of the present of invention have been described in detail, but described content is only preferred embodiment of the present invention, can not be considered to for limiting practical range of the present invention.All equalizations done according to the present patent application scope change and improve, and all should still belong within patent covering scope of the present invention.
Claims (10)
1. a brshless DC motor busbar voltage isolation monitoring system, is characterized in that: comprise the first signal amplifier modulate circuit, secondary signal amplifier modulate circuit, AD device and control module; The input end of the first signal amplifier modulate circuit connects the bus of brshless DC motor, and output terminal connects the input end of secondary signal amplifier modulate circuit; The output terminal of secondary signal amplifier modulate circuit connects the input end of AD device; The input end of the output terminal connection control unit of AD device.
2. a kind of brshless DC motor busbar voltage isolation monitoring system according to claim 1, it is characterized in that: also comprise isolation amplifier circuit, the output terminal of described first signal amplifier modulate circuit connects the input end of isolation amplifier circuit; The output terminal of isolation amplifier circuit connects the input end of secondary signal amplifier modulate circuit.
3. a kind of brshless DC motor busbar voltage isolation monitoring system according to claim 1 and 2, it is characterized in that: described first signal amplifier modulate circuit comprises sampling resistor, the first transient voltage suppressor diode, the first electric capacity and the first amplifier, the bus of described sampling resistor one termination brshless DC motor, other end ground connection; Described first transient voltage suppressor diode and the first electric capacity all in parallel with sampling resistor; The positive input terminal of termination first amplifier that described sampling resistor is connected with the negative pole of the first transient voltage suppressor diode; The 4th resistance is in series with, the 4th resistance and the second Capacitance parallel connection between the output terminal of the first amplifier and negative input end.
4. a kind of brshless DC motor busbar voltage isolation monitoring system according to claim 2, is characterized in that: one end of termination first resistance of described sampling resistor, another termination bus of the first resistance.
5. a kind of brshless DC motor busbar voltage isolation monitoring system according to claim 3 or 4, is characterized in that: one end of output termination the 3rd resistance of the first amplifier, the input end of another termination isolation amplifier circuit of the 3rd resistance.
6. a kind of brshless DC motor busbar voltage isolation monitoring system according to claim 2, is characterized in that: described isolation amplifier circuit comprises the second Transient Suppression Diode, the tenth resistance, the 3rd electric capacity, the 11 electric capacity and isolation amplifier; The input end of isolation amplifier is connected with the output terminal of the first amplifier; The input end of isolation amplifier is connected with the negative pole of the second transient voltage suppressor diode, the plus earth of the second transient voltage suppressor diode; The input end of isolation amplifier is connected with one end of the tenth resistance, and the other end of the tenth resistance connects one end of the 11 electric capacity, the other end ground connection of the 11 electric capacity; The input end of isolation amplifier is connected with one end of the 3rd electric capacity, the other end ground connection of the 3rd electric capacity; The output terminal of isolation amplifier connects the input end of secondary signal amplifier modulate circuit.
7. a kind of brshless DC motor busbar voltage isolation monitoring system according to claim 6, is characterized in that: described secondary signal amplifier modulate circuit comprises the 3rd amplifier, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the 8th electric capacity, the 9th electric capacity and the tenth electric capacity; One end of 5th resistance connects the output terminal of isolation amplifier, and the other end of the 5th resistance connects one end of the 6th resistance, the negative input end of another termination the 3rd amplifier of the 6th resistance, the positive input terminal ground connection of the 3rd amplifier; The input end of the output termination AD device of the 3rd resistance; One end of output termination the 9th electric capacity of the 3rd amplifier, the negative input end of another termination the 3rd amplifier of the 9th electric capacity; One end of output termination the 8th resistance of the 3rd amplifier, the other end of the 8th resistance connects the two ends that the 5th resistance is connected with the 6th resistance respectively, and the other end of the 8th resistance is also connected with one end of the 8th electric capacity, the other end ground connection of the 8th electric capacity.
8. a kind of brshless DC motor busbar voltage isolation monitoring system according to claim 1 and 2, is characterized in that: also comprise insulating power supply circuit, for powering for the first signal amplifier modulate circuit and isolation amplifier circuit.
9. a kind of brshless DC motor busbar voltage isolation monitoring system according to claim 8, it is characterized in that: the positive voltage output end of described insulating power supply circuit connects the positive voltage input end of the first signal amplifier modulate circuit, and the positive voltage output valve of insulating power supply circuit is 12 volts; The negative voltage output terminal of described insulating power supply circuit connects the negative voltage input end of the first signal amplifier modulate circuit, and the negative voltage output valve of insulating power supply circuit is-12 volts.
10. a kind of brshless DC motor busbar voltage isolation monitoring system according to claim 8, it is characterized in that: the positive voltage output end of described insulating power supply circuit connects the positive voltage input end of isolation amplifier circuit, and the positive voltage output valve of insulating power supply circuit is 12 volts; The negative voltage output terminal of described insulating power supply circuit connects the negative voltage input end of isolation amplifier circuit, and the negative voltage output valve of insulating power supply circuit is-12 volts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410542283.2A CN105572584A (en) | 2014-10-14 | 2014-10-14 | Isolation monitoring system for bus voltage of brushless direct-current motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410542283.2A CN105572584A (en) | 2014-10-14 | 2014-10-14 | Isolation monitoring system for bus voltage of brushless direct-current motor |
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|---|---|
| CN105572584A true CN105572584A (en) | 2016-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410542283.2A Pending CN105572584A (en) | 2014-10-14 | 2014-10-14 | Isolation monitoring system for bus voltage of brushless direct-current motor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107247174A (en) * | 2017-07-24 | 2017-10-13 | 重庆环投生态环境监测网络与工程治理有限公司 | Monitor the circuit of sewage disposal device multichannel operating mode electric current |
| CN110098831A (en) * | 2019-06-11 | 2019-08-06 | 深圳市红芯微科技开发有限公司 | A kind of isolation circuit |
| CN111384781A (en) * | 2020-04-29 | 2020-07-07 | 张立 | 5G communication base station electric power operation monitoring system |
-
2014
- 2014-10-14 CN CN201410542283.2A patent/CN105572584A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107247174A (en) * | 2017-07-24 | 2017-10-13 | 重庆环投生态环境监测网络与工程治理有限公司 | Monitor the circuit of sewage disposal device multichannel operating mode electric current |
| CN110098831A (en) * | 2019-06-11 | 2019-08-06 | 深圳市红芯微科技开发有限公司 | A kind of isolation circuit |
| CN110098831B (en) * | 2019-06-11 | 2024-02-09 | 深圳市红芯微科技开发有限公司 | Isolation circuit |
| CN111384781A (en) * | 2020-04-29 | 2020-07-07 | 张立 | 5G communication base station electric power operation monitoring system |
| CN111384781B (en) * | 2020-04-29 | 2020-12-18 | 上海民航新时代机场设计研究院有限公司 | 5G communication base station electric power operation monitoring system |
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Application publication date: 20160511 |