JP2011199996A5

JP2011199996A5 -

Info

Publication number: JP2011199996A5
Application number: JP2010062993A
Authority: JP
Filing date: 2010-03-18
Publication date: 2012-04-26

Description

請求項１に記載の発明は、直流電源の直流電圧を交流電圧に変換しモータを駆動するインバータと、ＤＣ／ＤＣコンバータと、該ＤＣ／ＤＣコンバータにＰＷＭ制御信号を出力するＤＣ／ＤＣコンバータ制御部と、前記ＤＣ／ＤＣコンバータによって充放電される蓄電器と、を備えたモータ駆動装置であって、
前記インバータの直流入力端子に並列に接続される第１の平滑コンデンサと、前記ＤＣ／ＤＣコンバータの動作を切り替える動作切替手段と、を備え、
前記蓄電器に流れる電流を検出する蓄電器電流検出回路と、前記第１の平滑コンデンサの端子電圧を検出する主回路直流電圧検出回路と、前記蓄電器の端子電圧を検出する蓄電器電圧検出回路と、を有した前記ＤＣ／ＤＣコンバータと、
直流電圧指令および蓄電器電圧指令と、前記ＤＣ／ＤＣコンバータにおける主回路直流電圧検出値と蓄電器電圧検出値並びに蓄電器電流検出値とを入力し、前記モータの運転状態または前記主回路直流電圧検出値並びに前記蓄電器電圧検出値に応じて前記動作切替手段を動作させ、前記ＰＷＭ制御信号を生成して出力する前記ＤＣ／ＤＣコンバータ制御部と、を備えたことを特徴とするものである。 According to the first aspect of the present invention, an inverter that converts a DC voltage of a DC power source into an AC voltage to drive a motor, a DC / DC converter, and a DC / DC converter control that outputs a PWM control signal to the DC / DC converter. A motor drive device comprising: a power storage unit that is charged and discharged by the DC / DC converter;
A first smoothing capacitor connected in parallel to the DC input terminal of the inverter, and an operation switching means for switching the operation of the DC / DC converter,
A capacitor current detection circuit for detecting a current flowing through the capacitor, a main circuit DC voltage detection circuit for detecting a terminal voltage of the first smoothing capacitor, and a capacitor voltage detection circuit for detecting a terminal voltage of the capacitor. Said DC / DC converter,
A DC voltage command and a capacitor voltage command, a main circuit DC voltage detection value, a capacitor voltage detection value, and a capacitor current detection value in the DC / DC converter are input, and the operating state of the motor or the main circuit DC voltage detection value and A DC / DC converter control unit configured to operate the operation switching unit according to the capacitor voltage detection value and generate and output the PWM control signal.

請求項３に記載の発明は、請求項１または請求項２に記載のモータ駆動装置において、前記ＤＣ／ＤＣコンバータ制御部が、前記直流電圧指令と前記主回路直流電圧検出値との偏差を増幅し、第１の電流指令を演算する直流電圧制御器と、蓄電池電圧指令値と前記蓄電器電圧検出値との偏差を反転増幅し、第２の電流指令を演算する蓄電器電圧制御器と、前記動作切替手段にて選択した前記第１の電流指令と前記第２の電流指令のいずれか一方と前記蓄電器電流検出値との偏差を増幅し、第１の電圧指令を演算する蓄電器電流制御器と、前記主回路直流電圧検出値と前記蓄電器電圧検出値との比から、前記蓄電器電流検出値が不連続となる第２の電圧指令を演算する初期充電動作演算器と、前記動作切替手段にて選択した前記第１の電圧指令もしくは前記第２の電圧指令のいずれか一方から前記ＰＷＭ制御信号を生成出力するＰＷＭ制御器と、を備えたことを特徴とするものである。 According to a third aspect of the present invention, in the motor drive device according to the first or second aspect , the DC / DC converter control unit amplifies a deviation between the direct-current voltage command and the main circuit direct-current voltage detection value. A DC voltage controller for calculating a first current command, a capacitor voltage controller for calculating a second current command by inverting and amplifying a deviation between a storage battery voltage command value and the capacitor voltage detection value, and the operation A capacitor current controller for amplifying a deviation between one of the first current command and the second current command selected by the switching means and the capacitor current detection value, and calculating a first voltage command; An initial charging operation calculator for calculating a second voltage command for making the capacitor current detection value discontinuous from a ratio between the main circuit DC voltage detection value and the capacitor voltage detection value, and selected by the operation switching means Said first voltage command Properly it is characterized in that and a PWM controller for generating and outputting the PWM control signal from one of said second voltage command.

請求項４に記載の発明は、請求項３に記載のモータ駆動装置において、前記制御切替手段は、第１の制御スイッチと、第２の制御スイッチと、を備え
前記第１の制御スイッチは前記第１の電流指令と前記第２の電流指令のいずれか一方を選択し、選択した電流指令を前記蓄電器電流制御器に入力し、前記第２の制御スイッチは前記第１の電圧指令と前記第２の電圧指令のいずれか一方を選択し、選択した電圧指令を前記ＰＷＭ制御器に入力することを特徴とするものである。 According to a fourth aspect of the present invention, in the motor drive device according to the third aspect , the control switching means includes a first control switch and a second control switch, and the first control switch is the Either one of the first current command and the second current command is selected, the selected current command is input to the capacitor current controller, and the second control switch is configured to input the first voltage command and the second current command. One of the two voltage commands is selected, and the selected voltage command is input to the PWM controller.

請求項５に記載の発明は、請求項1乃至４のいずれか１項に記載のモータ駆動装置において、前記ＤＣ／ＤＣコンバータは、自己消弧型半導体素子とダイオードを逆並列に接続することにより構成した半導体スイッチを２個直列接続し、第１の半導体スイッチのダイオードカソード側端子と第２の半導体スイッチのダイオードアノード側端子間に直流電圧を供給し、前記二つの半導体スイッチの共通接続点にリアクトルの一端を接続したものであり、前記リアクトルの他端と前記第２の半導体スイッチのダイオードアノード側端子間を前記蓄電器に接続したことを特徴とするものである。 According to a fifth aspect of the present invention, in the motor drive device according to any one of the first to fourth aspects, the DC / DC converter includes a self-extinguishing semiconductor element and a diode connected in antiparallel. Two configured semiconductor switches are connected in series, and a DC voltage is supplied between the diode cathode side terminal of the first semiconductor switch and the diode anode side terminal of the second semiconductor switch, and is connected to the common connection point of the two semiconductor switches. One end of the reactor is connected, and the other end of the reactor and the diode anode side terminal of the second semiconductor switch are connected to the capacitor.

請求項６に記載の発明は、請求項１乃至５のいずれか１項に記載のモータ駆動装置において、前記直流電源は、交流電源と前記交流電源の交流電圧を直流電圧に変換するダイオード整流器と、前記直流電圧を平滑化する第２の平滑コンデンサとを有することを特徴とするものである。 According to a sixth aspect of the present invention, in the motor drive device according to any one of the first to fifth aspects, the DC power source includes an AC power source and a diode rectifier that converts an AC voltage of the AC power source into a DC voltage. And a second smoothing capacitor for smoothing the DC voltage.

Claims

An inverter that drives a motor by converting a DC voltage of a DC power source into an AC voltage, a DC / DC converter, a DC / DC converter controller that outputs a PWM control signal to the DC / DC converter, and the DC / DC converter A motor drive device comprising a capacitor to be charged and discharged,
A first smoothing capacitor connected in parallel to the DC input terminal of the inverter;
Operation switching means for switching the operation of the DC / DC converter;
A capacitor current detection circuit for detecting a current flowing through the capacitor, a main circuit DC voltage detection circuit for detecting a terminal voltage of the first smoothing capacitor, and a capacitor voltage detection circuit for detecting a terminal voltage of the capacitor. Said DC / DC converter,
A DC voltage command and a capacitor voltage command, a main circuit DC voltage detection value, a capacitor voltage detection value, and a capacitor current detection value in the DC / DC converter are input, and the operating state of the motor or the main circuit DC voltage detection value and The DC / DC converter control unit that operates the operation switching unit according to the capacitor voltage detection value, generates and outputs the PWM control signal,
A motor driving device comprising:

The operation switching means includes a first switch,
A current limiting resistor;
A second switch;
Control switching means, wherein the first switch is connected in parallel with the current limiting resistor and the second switch connected in series, and the connection point of the first switch and the current limiting resistor is connected to the first switch. Connected to the positive electrode of a direct current power source, the connection point of the first switch and the second switch is connected to the positive electrode side of the first capacitor, and the connection point of the current limiting resistor and the second switch is connected to the DC Connected to the positive side of the DC / DC converter input, the negative side of the DC power supply is connected to the negative of the first smoothing capacitor and the negative input of the DC / DC converter,
In the control switching means, the PWM control signal is generated from the DC voltage command, the main circuit DC voltage detection value, and the capacitor current detection value, or the capacitor voltage command, the capacitor voltage detection value, and the capacitor current. 2. The motor drive device according to claim 1, wherein the motor drive device selects one of a detection value and a generation value from the main circuit DC voltage detection value and the capacitor voltage detection value.

The DC / DC converter control unit amplifies a deviation between the DC voltage command and the main circuit DC voltage detection value, and calculates a first current command;
A capacitor voltage controller that inverts and amplifies a deviation between the storage battery voltage command and the capacitor voltage detection value, and calculates a second current command;
A capacitor current controller that amplifies a deviation between one of the first current command and the second current command selected by the operation switching means and the capacitor current detection value and calculates the first voltage command. When,
An initial charge operation calculator for calculating a second voltage command in which the capacitor current detection value is discontinuous from a ratio between the main circuit DC voltage detection value and the capacitor voltage detection value;
2. A PWM controller that generates and outputs the PWM control signal from either the first voltage command or the second voltage command selected by the operation switching means. Or the motor drive device of Claim 2 .

The control switching means is
A first control switch;
A second control switch, wherein the first control switch selects either the first current command or the second current command, and inputs the selected current command to the capacitor current controller. ,
Said second control switch according to claim 3, characterized in that selects one of the second voltage command and the first voltage command, and inputs the voltage command selected in the PWM controller Motor drive device.

The DC / DC converter includes two semiconductor switches configured by connecting a self-extinguishing semiconductor element and a diode in antiparallel to each other in series, and the diode cathode side terminal of the first semiconductor switch and the second semiconductor switch A DC voltage is supplied between the diode anode side terminals of the two semiconductor switches, and one end of the reactor is connected to a common connection point of the two semiconductor switches, and the other end of the reactor and the diode anode side terminal of the second semiconductor switch the motor drive device according to any one of claims 1 to 4, characterized in that the connected to the capacitor between.

6. The DC power supply according to claim 1, further comprising: an AC power supply; a diode rectifier that converts an AC voltage of the AC power supply into a DC voltage; and a second smoothing capacitor that smoothes the DC voltage . The motor drive device of any one of Claims .