CN212305190U - Compressor driver of parking air conditioner - Google Patents
Compressor driver of parking air conditioner Download PDFInfo
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- CN212305190U CN212305190U CN202020878566.5U CN202020878566U CN212305190U CN 212305190 U CN212305190 U CN 212305190U CN 202020878566 U CN202020878566 U CN 202020878566U CN 212305190 U CN212305190 U CN 212305190U
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Abstract
The utility model discloses a compressor driver of parking air conditioner, the utility model discloses at first gather input voltage through voltage sampling sub-circuit, and realize voltage sampling in sending into main control circuit, still gather input current through current sampling sub-circuit simultaneously, input to main control circuit in, realize current sampling, and main control circuit then carries out the operation according to voltage signal and current signal and handles, output PWM signal to MOS drive sub-circuit in, reach the purpose of sine wave modulation, and finally, the signal output who will modulate again is to power inverter bridge sub-circuit in, drive the break-make of inside MOS pipe, through switching on of MOS pipe or the input of ending control compressor motor three-phase voltage, and then realize the control that the compressor motor opens and stop. Through the design, the utility model discloses can realize compressor motor drive's automatic control to reach the automatic control of parking air conditioner, use the convenience to improve greatly.
Description
Technical Field
The utility model relates to an air condition compressor control technical field, concretely relates to compressor driver of parking air conditioner.
Background
The battery voltage in the truck or the freight train is generally 12V or 24V, and in the process of waiting for unloading or parking and resting, if an original vehicle air conditioner is turned on, the engine needs to run at an idle speed, and then the air conditioner compressor can be driven to work. Therefore, the parking air conditioner is suitable for the driver, the parking air conditioner solves the comfort problem and saves energy, and the driver is not provided for the parking air conditioner at present, so that the parking air conditioner is inconvenient to use.
SUMMERY OF THE UTILITY MODEL
In order to solve the compressor driver of the parking-free air conditioner in the existing truck or lorry, the problem of inconvenience is used, the utility model aims to provide a driver of the parking air conditioner compressor of compatible 12V and 24V.
The utility model discloses the technical scheme who adopts does:
a compressor driver of a parking air conditioner comprises a signal acquisition circuit, a compressor control circuit and a main control circuit;
the signal acquisition circuit comprises a voltage sampling sub-circuit for acquiring input voltage and a current sampling sub-circuit for acquiring input current;
the compressor control circuit comprises a MOS drive sub-circuit and a power inverter bridge sub-circuit;
the signal output end of the voltage sampling sub-circuit and the signal output end of the current sampling sub-circuit are respectively and electrically connected with the first input end of the main control circuit, the first output end of the main control circuit is electrically connected with the input end of the power inverter bridge sub-circuit through the MOS driving sub-circuit, and the output end of the power inverter bridge sub-circuit is electrically connected with the three-phase voltage input end of the compressor motor.
In the above solution, the voltage sampling sub-circuit includes a first resistor, a second resistor, and a first capacitor;
one end of the first resistor is used as a voltage sampling end of the voltage sampling sub-circuit and is electrically connected with input voltage, the other end of the first resistor is respectively and electrically connected with one end of the second resistor and one end of the first capacitor, and the other end of the first capacitor is used as a signal output end of the voltage sampling sub-circuit and is electrically connected with a first input end of the main control circuit;
the other ends of the second resistor and the first capacitor are respectively grounded.
In the above optimization scheme, the current sampling sub-circuit includes an operational amplifier, a third resistor, a fourth resistor, a fifth resistor, a second capacitor, and a third capacitor;
a first signal input end of the operational amplifier is respectively and electrically connected with one end of the third resistor and one end of the second capacitor, and the other end of the third resistor is used as a current sampling end of the current sampling sub-circuit to collect input current;
a second signal input end of the operational amplifier is respectively and electrically connected with the other end of the second capacitor and the fourth resistor;
the output end of the operational amplifier is electrically connected with one end of the fifth resistor, the other end of the fifth resistor is grounded through the third capacitor, the other end of the fifth resistor is also used as the signal output end of the current sampling sub-circuit, and the other end of the fifth resistor is electrically connected with the first input end of the main control circuit.
The current sampling sub-circuit is connected with the first input end of the main control circuit, the second input end of the main control circuit is connected with the second input end of the current sampling sub-circuit, and the first input end of the current sampling sub-circuit is connected with the second input end of the main control circuit.
Optimized in the scheme, the MOS driving sub-circuit comprises an FD6287T type three-phase gate driving chip and peripheral circuits thereof;
the P1 pin-P6 pin of the FD6287T type three-phase gate driving chip is respectively used as the input end of the MOS driving sub-circuit and is electrically connected with the first output end of the main control circuit, the 18 th pin of the FD6287T type three-phase gate driving chip is used as the output end of the MOS driving sub-circuit and is electrically connected with the first input end of the power inverter bridge sub-circuit, the 15 th pin of the FD6287T type three-phase gate driving chip is used as the output end of the MOS driving sub-circuit and is electrically connected with the second input end of the power inverter bridge sub-circuit, and the 12 th pin of the FD6287T type three-phase gate driving chip is used as the output end of the MOS driving sub-circuit and is electrically connected with the third input end of the power inverter bridge sub-circuit.
According to the optimization of the scheme, the power inverter bridge sub-circuit comprises a first inverter bridge circuit unit, a second inverter bridge circuit unit and a third inverter bridge circuit unit which are connected in parallel;
the input end of the first inverter bridge circuit unit is used as the first input end of the power inverter bridge sub-circuit and is electrically connected with the 18 th pin of the FD6287T type three-phase gate drive chip, and the output end of the first inverter bridge circuit unit is electrically connected with the U-phase voltage input end of the compressor motor;
the input end of the second inverter bridge circuit unit is used as the second input end of the power inverter bridge sub-circuit and is electrically connected with the 15 th pin of the FD6287T type three-phase gate drive chip, and the output end of the second inverter bridge circuit unit is electrically connected with the V-phase voltage input end of the compressor motor;
the input end of the third inverter bridge circuit unit is used as the third input end of the power inverter bridge sub-circuit and is electrically connected with the 12 th pin of the FD6287T type three-phase gate drive chip, and the output end of the third inverter bridge circuit unit is electrically connected with the W-phase voltage input end of the compressor motor.
According to the optimization of the scheme, the first inverter bridge circuit unit, the second inverter bridge circuit unit and the third inverter bridge circuit unit respectively comprise a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a fourth capacitor, a fifth capacitor, and a first MOS transistor and a second MOS transistor which are connected in series with each other;
for each inverter bridge circuit cell:
the source electrode of the first MOS tube is electrically connected with the drain electrode of the second MOS tube, and is used as the input end of the inverter bridge circuit unit and is electrically connected with the output end of the MOS drive sub-circuit, the grid electrode of the first MOS tube is electrically connected with one end of the sixth resistor, the other end of the sixth resistor is used as the output end of the inverter bridge circuit unit and is electrically connected with the three-phase voltage input end of the compressor motor, and the seventh resistor and the fourth capacitor are respectively connected in parallel between the grid electrode and the source electrode of the first MOS tube;
the drain electrode of the second MOS tube is also connected in series with the eighth resistor, and the ninth resistor and the fifth capacitor are connected in parallel between the gate and the source of the second MOS tube;
the drain electrode of the first MOS tube in each inverter bridge circuit unit is electrically connected with the input voltage, and the source electrode of the second MOS tube in each inverter bridge circuit unit is grounded through a tenth resistor.
The fan control circuit is used for controlling the on-off of the fan in the compressor, wherein the second output end of the main control circuit is electrically connected with the input end of the fan control circuit, and the output end of the fan control circuit is electrically connected with the controlled end of the compressor fan.
The compressor motor is optimized by the scheme, and the compressor motor further comprises an external interface control circuit for inputting an external signal, wherein the output end of the external interface control circuit is electrically connected with the third input end of the main control circuit and is used for controlling the compressor motor to work according to the external signal.
The power inverter bridge circuit comprises a power inverter bridge sub-circuit, a main control circuit and a temperature acquisition circuit, wherein the power inverter bridge sub-circuit comprises a first input end and a second input end, the first input end is connected with the first input end of the main control circuit, the second input end is connected with the second input end of the main control circuit, and the second input end is connected with the third input end of.
The utility model has the advantages that:
(1) the utility model relates to a compressor driver of parking air conditioner, the utility model firstly collects the input voltage (namely the power supply voltage of the compressor driver) through the voltage sampling sub-circuit, converts the input voltage into a low-voltage small signal, sends the low-voltage small signal into the main control circuit to realize voltage sampling, simultaneously collects the input current (the power supply current of the compressor driver) through the current sampling sub-circuit, and amplifies the collected input current in the circuit, finally inputs the input current into the main control circuit to realize current sampling, the main control circuit carries out operation processing according to the voltage signal and the current signal, outputs PWM signal to the MOS driving sub-circuit, amplifies the PWM signal through the MOS driving sub-circuit to achieve the purpose of sine wave modulation, finally, outputs the signal of inverse modulation to the power bridge sub-circuit, controls the on-off of the MOS tube inside the power bridge sub-circuit according to the signal, the input of three-phase voltage of the compressor motor is controlled through the conduction or the cut-off of the MOS tube, and then the automatic control of the start and the stop of the compressor motor is realized.
Through the design, the utility model discloses the above-mentioned circuit of accessible realizes compressor motor drive's automatic control to reach the automatic control of parking air conditioner, use the convenience and improve greatly.
(2) The utility model discloses still be provided with overcurrent protection circuit, can reach overcurrent protection to the driver, great increase the security that the driver used.
(3) The utility model discloses still be provided with external interface control circuit, can gather main control circuit to external signal (like signals such as temperature switch, pressure switch, analog input voltage), main control circuit can handle and judge the signal, and then goes to control the compressor motor according to the signal of input and carry out corresponding operation. Through above-mentioned design, the user can use external interface control circuit freely to control compressor motor work, uses further improvement of convenience.
(4) The utility model discloses still be provided with the temperature acquisition circuit for real-time supervision power contravariant bridge sub-circuit's operating temperature, and convert temperature signal into low pressure signal, transmit to the master control circuit in. Through the design, the main control circuit can protect the temperature of the compressor motor according to the temperature signal, the compressor motor is prevented from being damaged due to over-temperature, and the use safety is greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a control block diagram of a compressor driver of a parking air conditioner according to the present invention.
Fig. 2 is a specific circuit diagram of the main control circuit provided by the present invention.
Fig. 3 is a specific circuit diagram of the voltage sampling sub-circuit provided by the present invention.
Fig. 4 is a specific circuit diagram of the current sampling sub-circuit provided by the present invention.
Fig. 5 is a specific circuit diagram of the over-current protection circuit provided by the present invention.
Fig. 6 is a specific circuit diagram of the MOS driving sub-circuit provided by the present invention.
Fig. 7 is a specific circuit diagram of a power inverter bridge sub-circuit provided by the present invention.
Fig. 8 is a specific circuit diagram of the fan control circuit provided by the present invention.
Fig. 9 is a specific circuit diagram of the external interface control circuit provided by the present invention.
Fig. 10 is a specific circuit diagram of the temperature acquisition circuit provided by the present invention.
Fig. 11 is a specific circuit diagram of the power conversion circuit provided by the present invention.
Fig. 12 is a specific circuit diagram of a power input circuit provided by the present invention.
Fig. 13 is a specific circuit diagram of the serial communication circuit provided by the present invention.
Fig. 14 is a circuit diagram of a debug interface provided by the present invention.
Detailed Description
The invention will be further elucidated with reference to the embodiments described hereinafter. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
Example one
As shown in fig. 1 to 14, the compressor driver of the parking air conditioner provided in this embodiment includes a signal acquisition circuit, a compressor control circuit, and a main control circuit.
The signal acquisition circuit comprises a voltage sampling sub-circuit for acquiring input voltage and a current sampling sub-circuit for acquiring input current.
And the signal output end VDC of the voltage sampling sub-circuit and the signal output end ISAMPLE of the current sampling sub-circuit are respectively and electrically connected with the first input end of the main control circuit.
In this embodiment, the signal acquisition circuit mainly acquires a voltage signal and a current signal, wherein the voltage sampling sub-circuit is responsible for acquiring an input voltage (i.e., a power supply voltage of the compressor driver) to obtain a voltage signal; the current collecting sub-circuit is responsible for collecting input current (namely power supply current of the compressor driver) to obtain a current signal, and finally, the collected voltage signal and the current signal are transmitted to the main control circuit to be subjected to operation processing to obtain a Pulse Width Modulation (PWM) signal, and finally, the compressor motor can be automatically controlled through the compressor control circuit.
In this embodiment, the input voltage and the input current are provided by a power battery on the automobile.
In this embodiment, the exemplary main control circuit is an STM32F030K6T6 type processing chip and its peripheral circuits, and a specific circuit diagram is shown in fig. 2.
As shown in fig. 3 and 4, the circuit components of the voltage sampling sub-circuit and the current sampling sub-circuit are specifically set forth as follows:
as shown in fig. 3, the voltage sampling sub-circuit includes a first resistor R17, a second resistor R23, and a first capacitor C16, wherein one end of the first resistor R17 is used as a voltage sampling end of the voltage sampling sub-circuit and is electrically connected to an input voltage, the other end of the first resistor R17 is electrically connected to one end of the second resistor R23 and one end of the first capacitor C16, respectively, the other end of the first capacitor C16 is used as a signal output end VDC of the voltage sampling sub-circuit and is electrically connected to a first input end of the main control circuit, and the other ends of the second resistor R23 and the first capacitor C16 are respectively grounded.
As shown in fig. 3, after the voltage sampling sub-circuit collects the input voltage, the collected voltage is converted into a low-voltage small signal, and the low-voltage small signal is transmitted to the STM32F030K6T6 type processing chip for voltage sampling, and as shown in fig. 2, the output end of the voltage sampling sub-circuit is electrically connected to the PA1 pin of the STM32F030K6T6 type processing chip.
As shown in fig. 4, the components of the current sampling sub-circuit may include, but are not limited to: the circuit comprises an operational amplifier U2A, a third resistor R8, a fourth resistor R10, a fifth resistor R9, a second capacitor C8 and a third capacitor C10.
The connection relationship of the electronic device is as follows: a first signal input end 3 of an operational amplifier U2A is electrically connected to one end of the third resistor R8 and one end of the second capacitor C8, respectively, and the other end of the third resistor R8 is used as a current sampling end IBUS of the current sampling sub-circuit to collect an input current; the second signal input end 2 of the operational amplifier U2A is electrically connected to the other end of the second capacitor C8 and the fourth resistor R10 respectively; an output end 1 of the operational amplifier U2A is electrically connected to one end of the fifth resistor R9, the other end of the fifth resistor R9 is grounded through the third capacitor C10, and the other end of the fifth resistor R9 is also used as a signal output end ISAMPLE of the current sampling sub-circuit and is electrically connected to the first input end of the main control circuit.
As shown in fig. 4, the current sampling sub-circuit performs operational amplification and conditioning amplification on the detected input current through an operational amplifier U2A, and finally outputs the amplified input current to an STM32F030K6T6 type processing chip to realize current signal sampling.
In this embodiment, the operational amplifier U2A is a TSV912 type operational amplifier, and the signal output end ISAMPLE of the current sampling sub-circuit is electrically connected to the PA3 pin of the STM32F030K6T6 type processing chip.
Meanwhile, as shown in fig. 3, a detailed circuit description of the current sampling sub-circuit is given below, except for the description of the current sampling sub-circuit, the first signal output terminal 3 of the operational amplifier U2A is electrically connected to a 3.3V dc power supply through a resistor R6, the first signal output terminal 3 is electrically connected to a resistor R7 and one end of a capacitor C6, and the other ends of the resistor R7 and the capacitor C6 are grounded, respectively. In addition, a resistor R13 and a capacitor C12 are connected in parallel between the second signal input end 2 and the output end 1 of the operational amplifier U2A, the positive power supply input end of the operational amplifier U2A is electrically connected with a 3.3V dc power supply, and the negative power supply input end is grounded.
Through voltage sampling sub-circuit and current sampling sub-circuit, then can realize the sampling of input voltage and the sampling of input current, and then accessible STM32F030K6T6 type processing chip carries out the operation and handles, obtains the PWM signal, transmits to the compressor control circuit in, obtains compressor on-off control signal, finally realizes compressor motor drive's automatic control.
As shown in fig. 6 and 7, the compressor control circuit is specifically described below:
the compressor control circuit comprises an MOS drive sub-circuit and a power inverter bridge sub-circuit, wherein the first output end of the main control circuit is electrically connected with the input end of the power inverter bridge sub-circuit through the MOS drive sub-circuit, and the output end of the power inverter bridge sub-circuit is electrically connected with the three-phase voltage input end of the compressor motor.
As shown in fig. 6, the following description of a specific circuit of the MOS drive sub-circuit is made:
the MOS drive sub-circuit comprises an FD6287T type three-phase gate drive chip U5 and peripheral circuits thereof, wherein pins P1 to P6 of the FD6287T type three-phase gate drive chip U5 are respectively used as input ends of the MOS drive sub-circuit and are respectively electrically connected with a first output end of the main control circuit, a pin 18 of the FD6287T type three-phase gate drive chip U5 is used as an output end of the MOS drive sub-circuit and is electrically connected with a first input end U of the power inverter bridge sub-circuit, a pin 15 of the FD62 6287T type three-phase gate drive chip U5 is used as an output end of the MOS drive sub-circuit and is electrically connected with a second input end V of the power inverter bridge sub-circuit, a pin 12 of the FD62 6287T type three-phase gate drive chip U5 is used as an output end of the MOS drive sub-circuit and is electrically connected with a third input end W of the power inverter bridge sub-circuit.
As shown in fig. 6, after the STM32F030K6T6 type processing chip performs operation processing on the input voltage signal and current signal and converts the processed signals into PWM signals, the PWM signals are transmitted to the FD6287T type three-phase gate driving chip U5 through pins PA8, PA9, PA10, PB0, PB1, and PA 7; and the PWM signal can be amplified through an FD6287T type three-phase gate driving chip U5 to achieve the purpose of sine wave modulation, and finally, the PWM signal can be output to a power inverter bridge sub-circuit through an 18 th pin, a 15 th pin and a12 th pin of the FD6287T type three-phase gate driving chip U5, and the control of the three-phase voltage input of the compressor motor is achieved by controlling the on-off of an MOS (metal oxide semiconductor) tube in the power inverter bridge sub-circuit, so that the automatic control of the start and stop of the compressor motor is further realized.
As shown in fig. 6, one resistor having a resistance value of 1K is provided between the P1 pin to the P6 pin of the FD6287T type three-phase gate driving chip U5 and the PA8, PA9, PA10, PB0, PB1, and PA7 pins of the STM32F030K6T6 type processing chip.
After the sine wave modulation of the signal is performed through the MOS driving sub-circuit, the PWM signal enters the power inverter bridge sub-circuit to perform the control of the MOS transistor (field effect transistor) switch, and the specific circuit is as shown in fig. 7:
as shown in fig. 7, the power inverter bridge sub-circuit includes three inverter bridge circuit units connected in parallel, and each inverter bridge unit has the same circuit composition, which is a first inverter bridge circuit unit, a second inverter bridge circuit unit, and a third inverter bridge circuit unit.
As shown in fig. 7, each inverter bridge circuit unit includes a sixth resistor R45, a seventh resistor R42, an eighth resistor R5, a ninth resistor R2, a fourth capacitor C7, a fifth capacitor C11, and a first MOS transistor Q1 and a second MOS transistor Q2 connected in series. The specific connection relationship of the electronic components can be seen in fig. 7.
For each inverter bridge circuit unit, the source of the first MOS transistor Q1 inside the inverter bridge circuit unit is electrically connected to the drain of the second MOS transistor Q2, and serves as the input terminal of the inverter bridge circuit unit, and is electrically connected to the output terminal of the MOS drive sub-circuit, the gate of the first MOS transistor Q1 is electrically connected to one end of the sixth resistor R45, the other end of the sixth resistor R45 serves as the output terminal of the inverter bridge circuit unit, and is electrically connected to the three-phase voltage input terminal of the compressor motor, and the seventh resistor R42 and the fourth capacitor C7 are respectively connected in parallel between the gate and the source of the first MOS transistor Q1. Meanwhile, the drain of the second MOS transistor Q2 is also connected in series with the eighth resistor R5, and the ninth resistor R2 and the fifth capacitor C11 are connected in parallel between the gate and the source of the second MOS transistor Q2.
The specific explanation for each inverter bridge circuit unit is as follows:
for the first inverter bridge circuit unit, the source of the first MOS transistor Q1 inside the first inverter bridge circuit unit is electrically connected to the 18 th pin of the FD6287T type three-phase gate driving chip U5, and the other end of the sixth resistor R45 is used as the output end of the first inverter bridge circuit unit and is electrically connected to the U-phase voltage input end of the compressor motor.
Similarly, for the second inverter bridge circuit unit, the source of the first MOS transistor Q1 inside the second inverter bridge circuit unit is electrically connected to the 15 th pin of the FD6287T type three-phase gate driving chip U5, and the other end of the sixth resistor R45 is used as the output end of the first inverter bridge circuit unit and is electrically connected to the V-phase voltage input end of the compressor motor.
Similarly, for the third inverter bridge circuit unit, the source of the first MOS transistor Q1 inside the third inverter bridge circuit unit is electrically connected to the 12 th pin of the FD6287T type three-phase gate driving chip U5, and the other end of the sixth resistor R45 is used as the output end of the first inverter bridge circuit unit and is electrically connected to the W-phase voltage input end of the compressor motor.
Through the design, the MOS tubes in the three inverter bridge circuit units can be used for respectively controlling the input of the three-phase voltage of the compressor motor, namely the connection or the disconnection of the MOS tubes is used for controlling the connection of each phase of electricity of the compressor motor, and further the automatic control of the drive of the compressor motor is realized.
As shown in fig. 7, the drain of the first MOS transistor Q1 in each inverter bridge circuit unit is electrically connected to the input voltage, and the source of the second MOS transistor in each inverter bridge circuit unit is grounded through the tenth resistor R98.
Through the above design, the utility model discloses an use voltage sampling sub-circuit and current sampling sub-circuit, the voltage sampling of input voltage and input current's current sampling has been realized, then handle the chip through STM32F030K6T6 type and carry out the operation to voltage signal and current signal, output PWM signal carries out the sine wave modulation back to MOS drive sub-circuit, export again to the power inverter bridge sub-circuit in, at last through the break-make of MOS pipe in the every inverter bridge circuit unit of control, the realization is to the control of compressor motor three-phase electricity input, and then reach the automatic control to compressor motor drive.
In this embodiment, a power input circuit is further provided, and is configured to perform filtering processing on the input voltage, and the filtered input voltage is connected to the power inverter bridge sub-circuit.
As shown in fig. 12, fig. 12 shows a specific circuit composition of the power input circuit, and the filtering process for the input voltage can be realized by forming fig. 12 with a plurality of capacitors connected in parallel.
In this embodiment, in order to guarantee the operation safety of driver, still be provided with overcurrent protection circuit, avoid the electric current too big to lead to the circuit to burn out, cause the incident.
As shown in fig. 5, an input end of the overcurrent protection circuit is electrically connected to the signal output end ISAMPLE of the current sampling sub-circuit, and an output end of the overcurrent protection circuit is electrically connected to the second input end of the main control circuit.
In the embodiment, for example, the over-current protection circuit is also composed of the TSV912 operational amplifier, and the specific circuit is shown in fig. 5.
The overcurrent protection circuit specifically works according to the following principle: the input current collected by the current collecting sub-circuit passes through a resistor R22 and then enters a TSV912 operational amplifier for amplification processing to generate a voltage to be compared with a reference voltage, and current protection can be achieved through a comparison result.
In the present embodiment, a fan control circuit for controlling the compressor fan is further provided, and the specific circuit is shown in fig. 8.
As shown in fig. 8, the second output end of the main control circuit is electrically connected to the input end FAN COM of the FAN control circuit, and the output end of the FAN control circuit is electrically connected to the controlled end of the compressor FAN.
The method specifically comprises the following steps: the resistor R57 is used as a signal input end of the fan control circuit and is electrically connected with a PB4 pin of the STM32F030K6T6 type processing chip, and finally, signals output by the STM32F030K6T6 type processing chip are amplified by triodes Q5, Q6 and Q7 in the fan control circuit to control a fan switch in the compressor.
In this embodiment, an external interface control circuit is further provided, and is configured to collect external signals (such as signals of a temperature switch, a pressure switch, a fault indicator light, an analog input voltage, and the like) into an STM32F030K6T6 type processing chip, and the STM32F030K6T6 type processing chip controls the compressor motor to perform corresponding operations according to the input signals.
The specific circuit composition of the external interface control circuit is as shown in fig. 9, and a resistor R54, a resistor R52, a resistor R53 and a resistor R59 in the external interface circuit are all used as output ends of the external interface circuit and are respectively and electrically connected with a PB3 pin, a PA12 pin, a PA11 pin and a PA2 pin of an STM32F030K6T6 type processing chip. The external signal input can be realized by the external interface circuit composed of fig. 9.
In this embodiment, a temperature acquisition circuit is further provided to monitor the operating temperature of the power inverter bridge sub-circuit in real time and to protect the compressor motor from overheating when the power inverter bridge sub-circuit is overheated.
In this embodiment, the temperature acquisition circuit specifically acquires the operating temperature of the MOS transistor in the power inverter bridge sub-circuit.
As shown in fig. 10, the output end of the temperature acquisition circuit is electrically connected to the fourth input end of the main control circuit, that is, one end of the resistor R43 in the circuit is used as the output end, and is electrically connected to the PA0 pin of the STM32F030K6T6 type processing chip, so as to transmit the temperature signal to the STM32F030K6T6 type processing chip, and the processing chip can perform a temperature protection action on the compressor motor according to the temperature signal, and when the compressor motor is overheated, the power supply of the compressor motor is cut off in time.
In the present embodiment, the power supply of the whole driver is mainly divided into 3.3V power supply and 15V power supply, wherein 3.3V is used as the power supply voltage of the STM32F030K6T6 type processing chip, and 15V power supply is used as the power supply of the MOS drive sub-circuit.
As shown in fig. 11, the power conversion circuit is used to supply power to the whole driver, in this embodiment, the input voltage is first converted into 15V DC voltage by XL1509 type DC-DC power conversion chip to supply power to the MOS drive sub-circuit, and then the 15V DC voltage is converted into 3,3V DC voltage by LD117S33 linear voltage stabilization chip to supply power to the STM32F030K6T6 type processing chip.
In this embodiment, a serial port communication circuit is further provided, which is used for the STM32F030K6T6 type processing chip to perform UART serial port communication with an external communication device, mainly used for debugging parameters and downloading programs, and a specific circuit is shown in fig. 13.
In this embodiment, a debugging interface circuit is further provided as a burner and emulator interface for debugging a program and downloading the program, and a specific circuit diagram is shown in fig. 14.
To sum up, adopt the utility model provides a parking air conditioner's compressor driver has following technological effect:
(1) the utility model discloses at first gather input voltage through voltage sampling sub-circuit, and convert it to the low pressure small-signal, realize voltage sampling in sending into main control circuit, still gather input current through current sampling sub-circuit simultaneously, and carry out the fortune with the input current who gathers in this circuit and put the regulation and enlarge, input to main control circuit at last, realize current sampling, and main control circuit then carries out the operation according to voltage signal and current signal and handles, output PWM signal is to MOS drive in the sub-circuit, enlarge through MOS drive sub-circuit, reach the purpose of sine wave modulation, and finally, in exporting the power inverter bridge sub-circuit with the signal output of modulation again, drive the break-make of inside MOS pipe, through switching on of MOS pipe or the input of ending control compressor three-phase voltage, and then realize compressor switch's automatic control.
The present invention is not limited to the above-mentioned optional embodiments, and any other products in various forms can be obtained by anyone under the teaching of the present invention, and any changes in the shape or structure thereof, all the technical solutions falling within the scope of the present invention, are within the protection scope of the present invention.
Claims (10)
1. A compressor driver of a parking air conditioner is characterized in that: the system comprises a signal acquisition circuit, a compressor control circuit and a main control circuit;
the signal acquisition circuit comprises a voltage sampling sub-circuit for acquiring input voltage and a current sampling sub-circuit for acquiring input current;
the compressor control circuit comprises a MOS drive sub-circuit and a power inverter bridge sub-circuit;
the signal output end (VDC) of the voltage sampling sub-circuit and the signal output end (ISAMPLE) of the current sampling sub-circuit are respectively and electrically connected with the first input end of the main control circuit, the first output end of the main control circuit is electrically connected with the input end of the power inverter bridge sub-circuit through the MOS driving sub-circuit, and the output end of the power inverter bridge sub-circuit is electrically connected with the three-phase voltage input end of the compressor motor.
2. The compressor driver of a parking air conditioner according to claim 1, wherein: the voltage sampling sub-circuit comprises a first resistor (R17), a second resistor (R23) and a first capacitor (C16);
one end of the first resistor (R17) is used as a voltage sampling end of the voltage sampling sub-circuit and is electrically connected with an input voltage, the other end of the first resistor (R17) is respectively and electrically connected with one end of the second resistor (R23) and one end of the first capacitor (C16), and the other end of the first capacitor (C16) is used as a signal output end (VDC) of the voltage sampling sub-circuit and is electrically connected with a first input end of the main control circuit;
the other ends of the second resistor (R23) and the first capacitor (C16) are respectively grounded.
3. The compressor driver of a parking air conditioner according to claim 1, wherein: the current sampling sub-circuit comprises an operational amplifier (U2A), a third resistor (R8), a fourth resistor (R10), a fifth resistor (R9), a second capacitor (C8) and a third capacitor (C10);
the first signal input end (3) of the operational amplifier (U2A) is electrically connected with one end of the third resistor (R8) and one end of the second capacitor (C8), and the other end of the third resistor (R8) is used as a current sampling end (IBUS) of the current sampling sub-circuit to collect input current;
a second signal input end (2) of the operational amplifier (U2A) is electrically connected with the other end of the second capacitor (C8) and the fourth resistor (R10) respectively;
the output end (1) of the operational amplifier (U2A) is electrically connected with one end of the fifth resistor (R9), the other end of the fifth resistor (R9) is grounded through the third capacitor (C10), and the other end of the fifth resistor (R9) is also used as the signal output end (ISAMPLE) of the current sampling sub-circuit and is electrically connected with the first input end of the main control circuit.
4. The compressor driver of a parking air conditioner according to claim 3, wherein: the current sampling circuit further comprises an overcurrent protection circuit, wherein the input end of the overcurrent protection circuit is electrically connected with the signal output end (ISAMPLE) of the current sampling sub-circuit, and the output end of the overcurrent protection circuit is electrically connected with the second input end of the main control circuit.
5. The compressor driver of a parking air conditioner according to claim 1, wherein: the MOS driving sub-circuit comprises an FD6287T type three-phase gate driving chip (U5) and peripheral circuits thereof;
the P1 pin to the P6 pin of the FD6287T type three-phase gate driving chip (U5) are respectively used as the input end of the MOS driving sub-circuit and are respectively electrically connected with the first output end of the main control circuit, the 18 th pin of the FD62 6287T type three-phase gate driving chip (U5) is used as the output end of the MOS driving sub-circuit and is electrically connected with the first input end (U) of the power inverter bridge sub-circuit, the 15 th pin of the FD6287T type three-phase gate driving chip (U5) is used as the output end of the MOS driving sub-circuit and is electrically connected with the second input end (V) of the power inverter bridge sub-circuit, the 12 th pin of the FD6287T type three-phase gate driving chip (U5) is used as the output end of the MOS driving sub-circuit and is electrically connected with the third input end (W) of the power inverter bridge.
6. The compressor driver of a parking air conditioner according to claim 5, wherein: the power inverter bridge sub-circuit comprises a first inverter bridge circuit unit, a second inverter bridge circuit unit and a third inverter bridge circuit unit which are connected in parallel;
the input end of the first inverter bridge circuit unit is used as the first input end (U) of the power inverter bridge sub-circuit and is electrically connected with the 18 th pin of the FD6287T type three-phase gate drive chip (U5), and the output end of the first inverter bridge circuit unit is electrically connected with the U-phase voltage input end of the compressor motor;
the input end of the second inverter bridge circuit unit is used as a second input end (V) of the power inverter bridge sub-circuit and is electrically connected with the 15 th pin of the FD6287T type three-phase gate drive chip (U5), and the output end of the second inverter bridge circuit unit is electrically connected with a V-phase voltage input end of a compressor motor;
the input end of the third inverter bridge circuit unit is used as the third input end (W) of the power inverter bridge sub-circuit and is electrically connected with the 12 th pin of the FD6287T type three-phase gate drive chip (U5), and the output end of the third inverter bridge circuit unit is electrically connected with the W-phase voltage input end of the compressor motor.
7. The compressor driver of a parking air conditioner according to claim 6, wherein: the first inverter bridge circuit unit, the second inverter bridge circuit unit and the third inverter bridge circuit unit respectively comprise a sixth resistor (R45), a seventh resistor (R42), an eighth resistor (R5), a ninth resistor (R2), a fourth capacitor (C7), a fifth capacitor (C11) and a first MOS transistor (Q1) and a second MOS transistor (Q2) which are connected in series;
for each inverter bridge circuit cell:
the source electrode of the first MOS transistor (Q1) is electrically connected with the drain electrode of the second MOS transistor (Q2), the first MOS transistor is used as the input end of the inverter bridge circuit unit and is electrically connected with the output end of the MOS drive sub-circuit, the grid electrode of the first MOS transistor (Q1) is electrically connected with one end of the sixth resistor (R45), the other end of the sixth resistor (R45) is used as the output end of the inverter bridge circuit unit and is electrically connected with the three-phase voltage input end of the compressor motor, and the seventh resistor (R42) and the fourth capacitor (C7) are respectively connected between the grid electrode and the source electrode of the first MOS transistor (Q1) in parallel;
the drain electrode of the second MOS tube (Q2) is also connected in series with the eighth resistor (R5), and the ninth resistor (R2) and the fifth capacitor (C11) are connected in parallel between the gate and the source electrode of the second MOS tube (Q2);
the drain electrode of the first MOS tube (Q1) in each inverter bridge circuit unit is electrically connected with the input voltage, and the source electrode of the second MOS tube in each inverter bridge circuit unit is grounded through a tenth resistor (R98).
8. The compressor driver of a parking air conditioner according to claim 1, wherein: the compressor FAN control circuit comprises a main control circuit and a FAN control circuit, wherein the main control circuit comprises a first output end (FAN COM) and a second output end (FAN COM), the first output end is electrically connected with the input end of the FAN control circuit, and the second output end is electrically connected with the controlled end of the FAN.
9. The compressor driver of a parking air conditioner according to claim 1, wherein: the compressor motor is characterized by further comprising an external interface control circuit used for inputting an external signal, wherein the output end of the external interface control circuit is electrically connected with the third input end of the main control circuit and used for controlling the compressor motor to work according to the external signal.
10. The compressor driver of a parking air conditioner according to claim 1, wherein: the power inverter bridge circuit further comprises a temperature acquisition circuit for acquiring the working temperature of the power inverter bridge sub-circuit, and the output end of the temperature acquisition circuit is electrically connected with the fourth input end of the main control circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020878566.5U CN212305190U (en) | 2020-05-22 | 2020-05-22 | Compressor driver of parking air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020878566.5U CN212305190U (en) | 2020-05-22 | 2020-05-22 | Compressor driver of parking air conditioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114189179A (en) * | 2021-12-17 | 2022-03-15 | 深圳市鑫辉微电子有限公司 | Automatic sorting barrel controller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114189179A (en) * | 2021-12-17 | 2022-03-15 | 深圳市鑫辉微电子有限公司 | Automatic sorting barrel controller |
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