CN105763042B - Control device and power inverter - Google Patents

Control device and power inverter Download PDF

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Publication number
CN105763042B
CN105763042B CN201410800136.0A CN201410800136A CN105763042B CN 105763042 B CN105763042 B CN 105763042B CN 201410800136 A CN201410800136 A CN 201410800136A CN 105763042 B CN105763042 B CN 105763042B
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communication
control
external
baud rate
bus
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CN105763042A (en
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山崎尊永
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Sanken Electric Co Ltd
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Sanken Electric Co Ltd
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Abstract

The present invention relates to control device and power inverters, with user's communication function and debugging communication function.The present invention provides control device and power inverter with user's communication function and debugging communication function by simple structure.Control device (Cnt1) of the invention has:Bus (BUS);Central operation processing unit (CPU), connect with the bus, and carries out system processing;And a communication unit (DMU), it is connect with the bus and the central operation processing unit, the communication unit has following function:It is performed in parallel serial communication between multiple external device (ED)s (Cnt2, IFD) with baud rate communication function different from each other and sets the function of the action mode of the communication unit according to the serial data exported from the multiple external device (ED).

Description

Control device and power inverter
Technical field
The present invention relates to control devices and electrical power conversion dress with user's communication function and debugging communication function It sets.
Background technique
A kind of MCU (Micro is disclosed in application publication number CN103150283A (Japanese Unexamined Patent Publication 2013-120979) Control Unit:Micro-control unit), have and is based on UART (Universal Asynchronous Receiver Transmitter:UART Universal Asynchronous Receiver Transmitter) mode asynchronous Serial Communication Function, and realize and adjust via communication line Try function.Each node of a piece communication line is driven by open-drain and is pulled to power supply, and it is dual to thus allow for half Transmitting-receiving process.
Above-mentioned MCU is consistent in order to make the baud rate between the communication node of itself and the communication node of debugging terminal, makees For the initial setting before communication process, the data of 0x55 etc. are sent with terminal to debugging.Then, debugging terminal meter pulse High width and Low width.Debugging terminal can identify the baud rate of MCU, therefore MCU and debugging terminal can ensure Mutual communication.
In the case where above-mentioned MCU is applied to the control device of power inverter, MCU is integrated in one together with driving portion In a semiconductor substrate or in a semiconductor module, the control device of power inverter is constituted.Driving portion receives electric power and turns The signal of each section of changing device carries out driving and the protection act of power inverter.In addition, in the knot of power inverter In terms of structure, MCU is sometimes for user's communication function and debugging communication function.User is for filling in control with communication function Set the Serial Communication Function that driving instruction and abnormal signal are received and dispatched between other control systems.User is for example existed with communication function From being in the state of upper all managing main frame functions in system, instruction or order are received by power inverter and is become In the case where more action state, or in the case where more power inverters of parallel drive, be each control device each other it Between communicated and necessary.Debugging with communication function to the program of MCU, debugging and deletion and is write for debugging terminal Enter the Serial Communication Function of the flash memory in MCU.In general, user's communication function and debugging are independent, difference with communication function With independent communication terminal.For example, debugging sheet sand covered function (the On-chip debug of communication function and CPU Function) it is connected closely.In addition, user's communication function is connect in the same manner as the periphery function of MCU with internal bus, constitute To generate signal according to needing to export interrupt request singal and event.
About control device, other than above-mentioned communication function, the high-precision driving for realizing power inverter is also required Deng multifunction, on the other hand, for realize power inverter miniaturization, it is desirable that the chip size of control device itself The reduction of the number of pins of downsizing or module.
Summary of the invention
The present invention provides a kind of control with user's communication function and debugging communication function by simple structure Device and power inverter.
Control device (Cnt1) of the invention is characterized in that having:
Bus (BUS);
Central operation processing unit (CPU), connect with the bus, carries out system processing;And
One communication unit (DMU), connect with the bus and the central operation processing unit,
The communication unit has following function:With multiple external device (ED)s with baud rate communication function different from each other The function of serial communication is performed in parallel between (Cnt2, IFD) and according to the serial number exported from the multiple external device (ED) According to the function for the action mode for setting the communication unit.
In accordance with the invention it is possible to be provided a kind of with user's communication function and debugging communication by simple structure The control device and power inverter of function.
Detailed description of the invention
Fig. 1 is the circuit block diagram for indicating the structural example of power inverter PCD of embodiment of the present invention.
Fig. 2 be indicate include the control device of embodiment of the present invention serial communication system (only user communicate) it is main The block diagram of the structural example in portion.
Fig. 3 is to indicate to include that (user's communication and debugging are logical for the serial communication system of the control device of embodiment of the present invention Letter) main portion structural example block diagram.
Fig. 4 is indicated in the serial communication system of Fig. 2 and Fig. 3, the state transition of the main actions example of communication unit DMU Figure.
Fig. 5 is the explanation of the action example in the case where indicating in the serial communication system of Fig. 2 only to carry out user's communication Figure.
Fig. 6 is to indicate to carry out user's communication in the serial communication system of Fig. 3 and debug the action example in the case where communication Explanatory diagram.
Fig. 7 is indicated in the main portion of the serial communication system (debugging system) of the control device comprising variation of the present invention Structural example block diagram.
Specific embodiment
Control device Cnt1 of the invention has:A/D converter section ADC, to from the electric signal that power module PM is exported into Row A/D is converted and is generated numerical data;Signal processing part DSP carries out at operation the numerical data inputted via bus B US Reason;Driving portion DRV, according to the operation result driving power module PM of signal processing part DSP;Central operation processing unit CPU, It is connect with bus B US, carries out system processing;And communication unit DMU (Dual Mode UART:Bimodulus UART), with bus B US It is connected with central operation processing unit CPU, and there is Serial Communication Function with multiple external device (ED)s, according to from multiple external device (ED)s The serial data set action mode of output.
Fig. 1 is the circuit block diagram for indicating the structural example of power inverter PCD of embodiment of the present invention.Electrical power conversion dress PCD is set with control device Cnt1 and power module PM.Control device Cnt1 is connect with power module PM and test section R1, R2, Aftermentioned multiple external device (ED)s are connected to via communication terminal Tc.Control device Cnt1 has A/D converter section ADC, signal processing Portion DSP, driving portion DRV, central operation processing unit CPU, communication unit DMU (Dual Mode UART), bus B US, memory ROM/RAM, D/A converter section DAC, comparing section CMP and communication terminal Tc.
The input terminal of A/D converter section ADC is connect with test section R1, R2, and output terminal is via bus B US and control device Each section of Cnt1 connects.A/D converter section ADC is taken into the electric signal exported from power module PM via test section R1, R2, to electricity Signal carries out A/D conversion and generates numerical data, and numerical data is exported and gives bus B US.
Signal processing part DSP is connect with bus B US, above-mentioned numerical data is taken into via bus B US, to above-mentioned numerical data Calculation process (based on long-pending and operation phase compensation etc.) is carried out, exports operation result (PWM duty cycle value) via bus B US Give driving portion DRV.
The input terminal of comparing section CMP is connect with power module PM and D/A converter section DAC, the output terminal of comparing section CMP It is connect with driving portion DRV.Comparing section CMP is for example to voltage and D/A converter section based on the electric current flowed through in power module PM The output voltage of DAC is compared and detection of excessive current state, be will test signal and is exported and gives driving portion DRV.
The input terminal of driving portion DRV is connect with bus B US and comparing section CMP, and output terminal is connect with power module PM. Driving portion DRV generates the driving signal (pwm signal) for corresponding to above-mentioned operation result (PWM duty cycle value), and driving signal is defeated Power module PM is given out.In addition, driving portion DRV is reduced when comparing section CMP detects the overcurrent condition of power module PM PWM duty cycle value limits the magnitude of current of power module PM.Specifically, driving portion DRV have drive signal generating unit PWM and Drive signal output department OUT.The input terminal of drive signal generating unit PWM is connect with signal processing part DSP and comparing section CMP, Output terminal is connect with drive signal output department OUT.The input terminal and drive signal generating unit of drive signal output department OUT PWM connection, output terminal are connect with power module PM.Drive signal generating unit PWM generates above-mentioned driving signal, and exports to drive Dynamic signal output section OUT.Drive signal output department OUT, which amplifies above-mentioned driving signal and exports, gives power module PM.
The input terminal and the output terminal of central operation processing unit CPU via bus B US and control device Cnt1 each portion Divide connection, and is connect with communication unit DMU.Central operation processing unit CPU according to the signal being taken into from bus B US and communication unit DMU, Carry out abnormality detection, protection processing and the communication of external device (ED) and log recording etc. of power module PM and control device Cnt1 Systematic processing.
The input terminal and the output terminal and central operation processing unit CPU, bus B US and a communication ends of communication unit DMU Sub- Tc connection.Communication unit DMU has following function:With multiple external device (ED)s with baud rate communication function different from each other Between be performed in parallel serial communication function and according to exported from the multiple external device (ED) serial data setting described in The function of the action mode of communication unit.That is, communication unit DMU can be connect via communication terminal Tc with multiple external device (ED)s, it can Handle the serial communication of the multiple external device (ED)s different from baud rate mixedly.
Power module PM is connect with input power Vin, load Ro, test section R1, R2 and control device Cnt1.Power module PM has transistor Tr, diode Di, reactor L and capacitor C.Transistor Tr is, for example, MOSFET, has the 1st main terminal (drain electrode), the 2nd main terminal (source electrode) and control terminal (grid).The driving of the control terminal and control device Cnt1 of transistor Tr Portion DRV connection.Control device Cnt1 is to control terminal output drive signal, to transistor Tr progress turn-on deadline driving or linearly Driving, so that the input electric power exported from input power Vin is converted to desired output power, and by output power export to Load Ro.The power module PM of Fig. 1 has the circuit structure of nonisulated voltage-dropping type, however can also be replaced into and turn input electric power Turn to the well known circuit structure of desired output power.
Fig. 2 and Fig. 3 be indicate comprising embodiment of the present invention control device serial communication system (user communicate when and Debugging communication when) main portion structural example block diagram.Fig. 4 is indicated in the serial communication system of Fig. 2 and Fig. 3, communication unit The state transition diagram of the main action example of DMU.Fig. 5 is indicated in the serial communication system of Fig. 2, and user's communication is only carried out In the case of action example explanatory diagram.Fig. 6 is indicated in the serial communication system of Fig. 3, and user's communication and debugging communication are carried out In the case where action example explanatory diagram.
The structure of Fig. 2 is in the case that control device Cnt1 is applied in system including power inverter PCD etc. Structural example is shown with control device Cnt1 and external device (ED) Cnt2, is only carried out between communication unit DMU and external device (ED) Cnt2 The case where communication.Control device Cnt1 is connect via communication terminal Tc with external device (ED) Cnt2.
In the present embodiment, communication path is 1 wire type, and 1 line is shared when being received and dispatched.Sender's communication line to be made For the NMOS ON for needing to make output circuit when LOW level, communication lines to be made need to make NMOS OFF when being HIGH, by outer The pull-up resistor lift level in portion.The method is that can not receive and dispatch half dual side of different data simultaneously between communicating phase hand Formula, however be effective method for the MCU that number of terminals is restricted.
External device (ED) Cnt2 is the upper control device of serial communication system, is used with control device Cnt1 progress user logical Letter.In control device Cnt1, communication unit DMU has determination part BRM (Baud Rate Measurement:Baud rate detection), Communication control unit CC (Communication Controller:Communication controler) and transfer part UART1.Determination part BRM and logical Letter control unit CC, transfer part UART1 are connected with communication terminal Tc.Communication control unit CC and transfer part UART1 and bus B US connects It connects, the interrupt request singal and event for exporting user's communication generate signal.Transfer part UART1 is connect with communication terminal Tc.It is logical Letter control unit CC is connect with central operation processing unit CPU, however the path does not use in the mode of Fig. 2, and is used for next The case where Fig. 3 of explanation.
When the structure of Fig. 3 is the program development of control device Cnt1 and debugging when structural example, have control device Cnt1, External device (ED) Cnt2, debugging terminal D T and interface arrangement IFD.Interface arrangement IFD has for being connect with debugging with terminal D T Usb communication portion and high speed baud rate side and low speed baud rate side UART communication unit.Control device Cnt1 is via communication ends Sub- Tc and connector are connect with the UART communication unit of the high speed baud rate side of interface arrangement IFD.That is, communication terminal Tc is and communication Portion DMU connection and the terminal that can be connect with external device (ED) Cnt2 or interface arrangement IFD.External device (ED) Cnt2 via connector with The UART communication unit of the low speed baud rate side of interface arrangement IFD connects.Debugging is with terminal D T via usb communication portion and interface arrangement IFD connection.Control device Cnt1 is connect via interface arrangement IFD with external device (ED) Cnt2 and debugging with terminal D T, is filled with outside It sets Cnt2 and carries out user's communication, and debug with communicating with debugging with terminal D T.In addition, the baud rate of user's communication For low speed (being, for example, less than 100Kbps), the baud rate of debugging communication is at a high speed (such as in 100Kbps or more).
In Fig. 2 and Fig. 3 arbitrary structures, determination part BRM is being according to from the external device (ED) via communication terminal Tc connection The serial data measurement baud rate exported when system initialization.In addition, communication control unit CC is set according to the measurement result of determination part BRM Determine the action mode of control device Cnt1.By these functions, a communication unit DMU is made to have user's communication function and debugging With communication function, so as to inhibit the addition of communication terminal Tc, the structure of simplified control device Cnt1.
The action example of the communication unit DMU of the serial communication system of explanatory diagram 2 and Fig. 3 below.Communication unit DMU has initial shape State IDLE, baud rate measurement state BAUD, user's communications status USER, debugging standby mode DBG_IDLE, user send state USR_TXD, user's reception state USR_RXD and debugging communications status DBG_CPU.
Firstly, communication control unit CC will lead to when detecting the failing edge for receiving the RXD of signal at original state IDLE Letter portion DMU is transferred to baud rate measurement state BAUD.In the case where measuring state BAUD, before the communications transaction with external device (ED) Initialization, the baud rate of determination part BRM measurement and external device (ED), communication control unit CC set the action mode of communication unit DMU.This When, serial pulses waveform (start bit=1, data=8 of for example, 0x55 are assigned from external device (ED) to control device Cnt1 Position, stop position=1), its High width and Low width are measured, identifies baud rate.
In the case where the measurement result of determination part BRM is less than certain value (such as 100Kbps), communication control unit CC will lead to Letter portion DMU is transferred to user communications status USER, makes it that user's communication is only used as to be worked with UART.In user's communications status Under USER, control device Cnt1 carries out UART movement with the low speed baud rate measured in the case where measuring state BAUD.Therefore, in Fig. 2 Structure in, due to determination part BRM measurement baud rate be less than defined value, communication control unit CC setting the 1st movement mould Formula carries out serial communication under the 1st action mode with low speed baud rate and external device (ED) Cnt2.
In addition, in the case where the measurement result of determination part BRM is more than certain value (such as 100Kbps), communication control Communication unit DMU is transferred to debugging standby mode DBG_IDLE by portion CC, doubles as communication unit DMU for user communication UART and tune Ping credit UART.In the case where debugging standby mode DBG_IDLE, control device Cnt1 is constantly to the life inputted from external device (ED) Order is decoded.Therefore, in the structure in figure 3, since the baud rate of determination part BRM measurement is more than defined value, lead to Believe that control unit CC sets the 2nd action mode, under the 2nd action mode, is carried out with high speed baud rate and interface arrangement IFD serial Communication, and serial communication is carried out via interface arrangement IFD and external device (ED) Cnt2.In the case where debugging standby mode DBG_IDLE, It is not inputted from external device (ED) in the case where ordering, communication unit DMU is transferred to user and sends state USR_ by communication control unit CC TXD.In the case where user sends state USR_TXD, transmission enters transmission caching (such as the tx_ of user's communication with data Shift_reg sends shift register) in the case where, transmission is sent to interface arrangement IFD with data by control device Cnt1. Hereafter, communication unit DMU reverts to debugging standby mode DBG_IDLE.At this point, control device Cnt1 is in the case where measuring state BAUD The high speed baud rate of measurement carries out UART movement.
In the case where debugging standby mode DBG_IDLE, if control device Cnt1 receives order USR_RXD, communication control Communication unit DMU is transferred to user's reception state DBG_RXD by portion CC.In turn, control device Cnt1 is received sends from external device (ED) The data for 1 byte come, and be stored in the reception caching of user's communication (such as rx_shift_reg, it receives and moves Bit register), if it is desired, it then exports interrupt request singal and event generates signal.Hereafter, communication unit DMU is transferred to user Transmission state USR_TXD, if it is desired, then carry out above-mentioned user's transmission processing.Even if in this series of action process, control Device Cnt1 processed also carries out communication operation with the high speed baud rate measured in the case where measuring state BAUD.
In the case where debugging standby mode DBG_IDLE, if control device Cnt1 receives the order for of debugging communications transaction DBG (is used for DBG), then communication unit DMU is transferred to debugging communications status DBG_CPU by communication control unit CC.Shape is communicated in debugging Under state DBG_CPU, control device Cnt1 carries out the processing with debugging communication, until completing to debug sequence.In debugging sequence In column, order and data needed for communication control unit CC receives and dispatches debugging processing between central operation processing unit CPU.Even if In this series of action process, control device Cnt1 also carries out UART with the high speed baud rate measured in measurement state BAUD Movement.Hereafter, communication unit DMU is transferred to user and sends state USR_TXD, if it is desired, then carries out above-mentioned user's transmission processing. That is, control device Cnt1 carries out the transmitting-receiving movement that user leads to credit data when not carrying out debugging communications transaction.
As described above, action mode of the control device Cnt1 according to the measurement result switching communication unit DMU of baud rate, therefore It can be attached and be communicated by a communication unit DMU multiple external device (ED)s different from baud rate, be able to suppress logical Believe the addition of terminal Tc, the structure of simplified control device Cnt1.In addition, double as user's communication with UART in communication unit DMU and In the case that debugging communication is with UART, control device Cnt1 switches the action mode of communication unit DMU according to the order of external device (ED), Therefore by combined interface device IFD, can finally be realized by a communication unit DMU it is different from baud rate simultaneously it is multiple outside Part device is attached and is communicated.
As described above, the present invention is described by embodiment, however constitute the opinion of a part of the disclosure It states and should not be construed as limiting the present invention with attached drawing.According to the disclosure, those of ordinary skill in the art should be understood that various Alternate embodiments, embodiment and application technology.That is, the present invention includes various embodiments not described herein etc. certainly.Cause This, technical scope of the invention should determine that item adds by the invention according to the above description and clearly for appropriate claims With determination.For example, control device Cnt1 is not limited to apply in the system comprising power inverter PCD, it is also applied to needs In the system of the serial communication of external device (ED).In addition, being only limitted to be adjusted to only carry out the write-in of the onboard flash memory of MCU In the case where pinging letter, as shown in fig. 7, control device Cnt1 and external device (ED) Cnt2 can be directly connected to, and via interface Device IFD connection control device Cnt1 and debugging terminal D T.In addition, the baud rate of the action mode of switching communication unit DMU Threshold value is suitably set according to the baud rate for the external device (ED) that can be connect with control device Cnt1.In addition, as power module Structure, can suitably change insulation and it is nonisulated, boosting and buck and the quantity of transistor unit etc., can be used for will Input electric power is converted to the structure of the output power with desired voltage, electric current and frequency.In addition, constituting driving portion DRV Drive signal output department OUT can be set on the semiconductor substrate different from drive signal generating unit PWM.In addition, this hair It is bright to be not limited to apply in the serial communication of 1 wire type, moreover it is possible in the serial communication applied to 2 wire types.

Claims (6)

1. a kind of control device (Cnt1), which is characterized in that have:
Bus (BUS);
Central operation processing unit (CPU), connect with the bus, and carries out system processing;And
One communication unit (DMU), is attached with the bus and the central operation processing unit,
The communication unit has following function:
String is being performed in parallel between multiple external device (ED)s (Cnt2, IFD) of the communication function different from each other with baud rate Row communication;And
The action mode of the communication unit is set according to the serial data exported from the multiple external device (ED),
The communication unit has determination part (BRM), and the determination part (BRM) is according to the serial number exported from the multiple external device (ED) Baud rate according to surveying and determination,
The communication unit has communication control unit (CC), which sets according to the measurement result of the determination part The action mode,
The communication control unit,
When the baud rate measured by the determination part is less than defined value, the 1st action mode is set, in the 1st action mode Under, it can be communicated with the 1st baud rate with the 1st external device (ED) (Cnt2),
When the baud rate measured by the determination part is that defined value is above, the 2nd action mode is set, acts mould the 2nd Under formula, it can be communicated with the 2nd baud rate for being higher than the 1st baud rate with the 2nd external device (ED) (IFD), and via the 2nd External device (ED) (IFD) is communicated with the 1st external device (ED).
2. control device according to claim 1, which is characterized in that
The control device has at least one terminal (Tc), which is attached with the communication unit, and energy It is enough to be attached with the 1st external device (ED) (Cnt2) or the 2nd external device (ED) (IFD).
3. control device according to claim 2, which is characterized in that
At least one terminal can be either directly or indirectly attached with the multiple external device (ED).
4. control device (Cnt1) according to claim 1, which is characterized in that have:
A/D converter section (ADC) carries out A/D conversion to the electric signal exported from power module (PM) and generates numerical data;
Signal processing part (DSP) carries out calculation process to the numerical data inputted via the bus;And
Driving portion (DRV (PWM&OUT)) drives the power module according to the operation result of the signal processing part.
5. a kind of power inverter, which is characterized in that have:
Control device as claimed in claim 4;And
Power module, with transistor, which is attached with the driving portion, and according to the signal processing part Operation result is driven.
6. power inverter according to claim 5, which is characterized in that
The power inverter has external device (ED), which is the host control device of serial communication system,
The control device is attached via the communication unit and the external device (ED).
CN201410800136.0A 2014-12-19 2014-12-19 Control device and power inverter Active CN105763042B (en)

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Citations (4)

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CN103077151A (en) * 2013-01-25 2013-05-01 上海斐讯数据通信技术有限公司 Device for switching universal serial bus (USB) interface and standard serial port
CN103150283A (en) * 2011-12-06 2013-06-12 株式会社日立超Lsi系统 Electronic apparatus

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Publication number Priority date Publication date Assignee Title
JP3888070B2 (en) * 2001-02-23 2007-02-28 株式会社ルネサステクノロジ Logic circuit module having power consumption control interface and storage medium storing the module
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Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
CN101669102A (en) * 2007-04-27 2010-03-10 爱特梅尔公司 Serialization of data in multi-chip bus implementation
CN102195486A (en) * 2010-03-09 2011-09-21 株式会社村田制作所 Isolated switching power supply apparatus
CN103150283A (en) * 2011-12-06 2013-06-12 株式会社日立超Lsi系统 Electronic apparatus
CN103077151A (en) * 2013-01-25 2013-05-01 上海斐讯数据通信技术有限公司 Device for switching universal serial bus (USB) interface and standard serial port

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