JP2010124540A - Motor controller and refrigerator/air-conditioner and household electrical appliances using the controller - Google Patents

Motor controller and refrigerator/air-conditioner and household electrical appliances using the controller Download PDF

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JP2010124540A
JP2010124540A JP2008293589A JP2008293589A JP2010124540A JP 2010124540 A JP2010124540 A JP 2010124540A JP 2008293589 A JP2008293589 A JP 2008293589A JP 2008293589 A JP2008293589 A JP 2008293589A JP 2010124540 A JP2010124540 A JP 2010124540A
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lower arm
switching elements
motor
control unit
voltage
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Akira Sakai
顕 酒井
Katsuhiko Saito
勝彦 齋藤
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Mitsubishi Electric Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a small, low-cost, and reliable motor controller. <P>SOLUTION: The motor controller includes: an inverter circuit having switching elements 1 to 6 of an upper arm and a lower arm three-phase bridge-connected between the positive pole and negative pole of a direct-current power supply 22 and connected with a motor 25 on the output side, diodes 7 to 12 respectively connected in inverse parallel with the switching elements 1 to 6 of the upper arm and the lower arm; high voltage-side drive circuits 13 to 15 that respectively drive the switching elements 1 to 3 of the upper arm, a current sensing resistor 20 that detects the current of the motor 25 passed through the individual switching elements 4 to 6 of the lower arm, and an amplifier circuit 21; and a control unit 19 that generates driving signals for the individual switching elements 1 to 6 of the upper arm and the lower arm. The switching elements 4 to 6 of the lower arm are driven within the range of the control voltage of the control unit 19. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、直流電圧を交流電圧に変換しモーターに電圧を印加するインバーター回路とそれを制御する制御部を備えたモーター制御装置、この制御装置を用いた冷凍空調装置及び家電機器に関するものである。   The present invention relates to an inverter circuit that converts a DC voltage into an AC voltage and applies a voltage to a motor, a motor control device that includes a control unit that controls the inverter circuit, a refrigeration air conditioner using the control device, and household appliances. .

従来のインバータ回路は、直流電源の正極と負極の間に３相ブリッジに接続された上アームスイッチング素子及び下アームスイッチング素子（例えば、ＩＧＢＴやＭＯＳ−ＦＥＴ）と、この６個のスイッチング素子にそれぞれ並列に接続されたフライホイールダイオードと、上アームスイッチング素子のゲートに接続された高圧側駆動回路と、下アームスイッチング素子のゲートに接続された低圧側駆動回路とで構成されている。マイコン等の制御部から駆動信号が高圧側駆動回路と低圧側駆動回路に出力されると、前述の各スイッチング素子がオン／オフされ上アームスイッチング素子と下アームスイッチング素子の接続点からモーターに電圧が供給される（例えば、特許文献１参照）。   The conventional inverter circuit includes an upper arm switching element and a lower arm switching element (for example, IGBT or MOS-FET) connected to a three-phase bridge between a positive electrode and a negative electrode of a DC power supply, and each of these six switching elements. A flywheel diode connected in parallel, a high-voltage side drive circuit connected to the gate of the upper arm switching element, and a low-voltage side drive circuit connected to the gate of the lower arm switching element. When a drive signal is output from a control unit such as a microcomputer to the high-voltage side drive circuit and the low-voltage side drive circuit, each of the aforementioned switching elements is turned on / off, and the voltage is applied to the motor from the connection point between the upper arm switching element and the lower arm switching element. Is supplied (see, for example, Patent Document 1).

特開２００７−２６７５６０号公報（図１）JP 2007-267560 A (FIG. 1)

従来のインバータ回路は、マイコン等の制御部からスイッチング素子に出力される駆動信号の電圧とスイッチング素子のオン／オフ動作電圧のレベルが異なるため、下アームスイッチング素子を制御部にて制御する際、制御部とスイッチング素子のゲート間に駆動信号の電圧を変換するための低圧側駆動回路が接続されている。例えば、制御部であるマイコンの制御電源がＤＣ５Ｖの場合、スイッチング素子の駆動信号を出力する出力ポートはマイコンの制御電源以下のＨ信号とＬ信号を出力することができ、Ｈ信号はＤＣ約５Ｖ、Ｌ信号は約０Ｖとなり、これらＨ信号やＬ信号によりスイッチング素子を制御するのであるが、スイッチング素子のオン動作電圧が例えばＤＣ１５Ｖの場合、マイコンの駆動信号と電圧レベルが異なるため、電圧レベルを変換する低圧側駆動回路が必要となる。この場合、低圧側駆動回路の部品分コストがかかり、また、低圧側駆動回路の部品を基板等に実装する際に広いスペースが必要となるという課題がある。   In the conventional inverter circuit, the voltage of the drive signal output to the switching element from the control unit such as a microcomputer is different from the level of the on / off operation voltage of the switching element. Therefore, when the lower arm switching element is controlled by the control unit, A low-voltage side drive circuit for converting the voltage of the drive signal is connected between the control unit and the gate of the switching element. For example, when the control power supply of the microcomputer that is the control unit is DC5V, the output port that outputs the drive signal of the switching element can output the H signal and the L signal below the control power supply of the microcomputer, and the H signal is about DC 5V. The L signal is about 0 V, and the switching element is controlled by these H signal and L signal. However, when the switching element ON operation voltage is, for example, DC 15 V, the voltage level is different from the driving signal of the microcomputer. A low-voltage side drive circuit for conversion is required. In this case, there is a problem that a cost corresponding to the components of the low-voltage side drive circuit is required, and a large space is required when the components of the low-voltage side drive circuit are mounted on a substrate or the like.

また、低圧側駆動回路は、多くの部品で構成されているため、各部品の動作に遅れが発生することにより、制御部からの駆動信号が出力されてから実際に下アームスイッチング素子が動作するまでに遅れが生じるという課題がある。また、動作遅れのため上アームと下アームの各スイッチング素子の短絡を防止するデッドタイムの設定の制約が大きくなっている。   In addition, since the low-voltage side drive circuit is composed of many components, a delay occurs in the operation of each component, so that the lower arm switching element actually operates after the drive signal is output from the control unit. There is a problem that a delay occurs. In addition, due to a delay in operation, restrictions on setting a dead time for preventing a short circuit between the switching elements of the upper arm and the lower arm are increasing.

本発明は、前記のような課題を解決するためになされたもので、小型、低コストで、信頼性の高いモーター制御装置、この制御装置を用いた冷凍空調装置及び家電機器を得ることを目的とする。   The present invention has been made to solve the above-described problems, and an object thereof is to obtain a small, low-cost, highly reliable motor control device, a refrigerating air-conditioning apparatus and home appliances using the control device. And

本発明に係るモーター制御装置は、直流電源の正極と負極との間に３相ブリッジ接続され、出力側にモーターが接続される上アームと下アームの各スイッチング素子、上アームと下アームの各スイッチング素子にそれぞれ逆並列に接続されたダイオード、上アームの各スイッチング素子をそれぞれ駆動する駆動回路、下アームの各スイッチング素子及びダイオードを介して流れるモーターの電流を検出する電流検出手段を有するインバータ回路と、上アームと下アームの各スイッチング素子の駆動信号を生成する制御部とを備え、下アームの各スイッチング素子として制御部の制御電圧で駆動可能なものを用いるようにした。   The motor control device according to the present invention has a three-phase bridge connection between the positive electrode and the negative electrode of a DC power supply, and each switching element of the upper arm and the lower arm to which the motor is connected on the output side, and each of the upper arm and the lower arm. An inverter circuit having a diode connected in antiparallel to the switching element, a drive circuit for driving each switching element of the upper arm, and a current detection means for detecting the current of the motor flowing through each switching element of the lower arm and the diode And a control unit that generates drive signals for the switching elements of the upper arm and the lower arm, and those that can be driven by the control voltage of the control unit are used as the switching elements of the lower arm.

本発明においては、制御部と下アームのスイッチング素子の間に駆動信号の電圧を変換する駆動回路を配置しない構成としたので、モーター制御装置の回路を簡素化でき、このため、コストを下げることができ、また、回路が基板に占める面積を縮小でき、回路動作の遅れを抑制することが可能になる。   In the present invention, since the drive circuit for converting the voltage of the drive signal is not arranged between the control unit and the switching element of the lower arm, the circuit of the motor control device can be simplified, thereby reducing the cost. In addition, the area that the circuit occupies on the substrate can be reduced, and delays in circuit operation can be suppressed.

図１は本発明の実施の形態に係るモーター制御装置を示す回路図である。
図１において、上アームスイッチング素子１，２，３と下アームスイッチング素子４，５，６は、ＩＧＢＴやＭＯＳ−ＦＥＴなどの電力用半導体素子からなり、直流電源２２の正極と負極との間に３相ブリッジ接続されている。３相ブリッジ接続による各接続点は、本制御装置の出力端子(図示せず)を介してモーター２５に接続される。前述した６個のスイッチング素子１〜６には、環流時の逆方向電流を流すフライホイールダイオード７〜１２が並列に接続されている。 FIG. 1 is a circuit diagram showing a motor control device according to an embodiment of the present invention.
In FIG. 1, upper arm switching elements 1, 2, 3 and lower arm switching elements 4, 5, 6 are composed of power semiconductor elements such as IGBTs and MOS-FETs, and are arranged between the positive electrode and the negative electrode of DC power supply 22. Three-phase bridge connection. Each connection point by the three-phase bridge connection is connected to the motor 25 via an output terminal (not shown) of the present control device. The above-described six switching elements 1 to 6 are connected in parallel with the flywheel diodes 7 to 12 that flow a reverse current during circulation.

上アームスイッチング素子１，２，３のゲートには、それぞれ高圧側駆動回路１３，１４，１５が接続されている。高圧側駆動回路１３，１４，１５は、直流電源２３が接続され、制御部１９からの駆動信号の電圧レベルを上アームスイッチング素子１，２，３のオン動作電圧に変換する。この高圧側駆動回路１３，１４，１５は、一般的にＨＶＩＣと呼ばれ、回路構成としては公知のものである。下アームスイッチング素子４，５，６のゲートには、各ゲートに流れる電流を調整する抵抗１６，１７，１８が接続されている。この抵抗１６，１７，１８により下アームスイッチング素子４，５，６の立上りや立下りなどの応答時間が調整されている。なお、抵抗に代えてダイオードやコンデンサ等の回路素子でも良い。また、抵抗などの回路素子をスイッチング素子のゲートと出力端子間に接続しても良い。   High-voltage side drive circuits 13, 14, 15 are connected to the gates of the upper arm switching elements 1, 2, 3, respectively. The high-voltage side drive circuits 13, 14, 15 are connected to a DC power supply 23 and convert the voltage level of the drive signal from the control unit 19 into the ON operation voltage of the upper arm switching elements 1, 2, 3. The high-voltage side drive circuits 13, 14, and 15 are generally called HVIC and have a known circuit configuration. Resistors 16, 17 and 18 for adjusting the current flowing through the gates are connected to the gates of the lower arm switching elements 4, 5 and 6. Response times of rising and falling of the lower arm switching elements 4, 5 and 6 are adjusted by the resistors 16, 17 and 18. Note that a circuit element such as a diode or a capacitor may be used instead of the resistor. Further, a circuit element such as a resistor may be connected between the gate of the switching element and the output terminal.

電流検出用抵抗２０は、例えばシャント抵抗よりなり、一端が直流電源２２の負極に接続され、他端が下アームスイッチング素子４，５，６の接続点に接続されている。この電流検出用抵抗２０に流れる電流から発生する電圧を増幅する増幅回路２１が制御部１９と電流検出用抵抗２０の入力端との間に挿入されている。なお、増幅回路２１に代えてフィルタ回路を用いても両回路で構成しても良い。前記の電流検出用抵抗２０と増幅回路２１とで電流検出手段が構成されている。   The current detection resistor 20 is made of, for example, a shunt resistor, and one end is connected to the negative electrode of the DC power supply 22 and the other end is connected to the connection point of the lower arm switching elements 4, 5, 6. An amplifier circuit 21 that amplifies the voltage generated from the current flowing through the current detection resistor 20 is inserted between the control unit 19 and the input end of the current detection resistor 20. Note that a filter circuit may be used in place of the amplifier circuit 21, or both circuits may be used. The current detection resistor 20 and the amplifier circuit 21 constitute current detection means.

前述した上アームと下アームの各スイッチング素子１〜６、この６個のスイッチング素子に逆並列に接続されたフライホイールダイオード７〜１２、上アームスイッチング素子１，２，３をそれぞれ駆動する高圧側駆動回路１３，１４，１５、下アームスイッチング素子４，５，６のゲートにそれぞれ接続された抵抗１６，１７，１８、電流検出用抵抗２０，増幅回路２１などの各部品でインバータ回路が構成されている。   Each of the switching elements 1 to 6 of the upper arm and the lower arm, the flywheel diodes 7 to 12 connected in reverse parallel to the six switching elements, and the high voltage side for driving the upper arm switching elements 1, 2 and 3, respectively. The inverter circuit is composed of components such as the drive circuits 13, 14, 15 and the resistors 16, 17, 18 connected to the gates of the lower arm switching elements 4, 5, 6 respectively, the current detection resistor 20, and the amplifier circuit 21. ing.

制御部１９は、マイコンやＤＳＰなどで構成され、上アームと下アームの各スイッチング素子１〜６のオン／オフを制御する駆動信号を生成する。下アームスイッチング素子４，５，６をオン／オフ制御するための駆動信号の電圧レベルは、直流電源２４の電圧レベル以下である。例えば、制御部１９の制御電圧である直流電源２４の電圧がＤＣ５Ｖの場合、下アームスイッチング素子４，５，６の駆動信号も０〜５Ｖである。このため、下アームスイッチング素子４，５，６には、０〜５Ｖの電圧範囲内でオン／オフする電力用半導体素子が用いられている。   The control unit 19 is configured by a microcomputer, a DSP, and the like, and generates a drive signal for controlling on / off of the switching elements 1 to 6 of the upper arm and the lower arm. The voltage level of the drive signal for on / off control of the lower arm switching elements 4, 5, 6 is equal to or lower than the voltage level of the DC power supply 24. For example, when the voltage of the DC power supply 24 that is the control voltage of the control unit 19 is DC 5V, the drive signals of the lower arm switching elements 4, 5, and 6 are also 0 to 5V. For this reason, power semiconductor elements that are turned on / off within a voltage range of 0 to 5 V are used for the lower arm switching elements 4, 5, and 6.

従来例と構成上で異なるのは、下アームスイッチング素子４，５，６をオン／オフ制御するための駆動信号の電圧レベルが直流電源２４の電圧レベル以下である点と、下アームスイッチング素子４，５，６に低圧側駆動回路が接続されていない点である。   The difference from the conventional example is that the voltage level of the drive signal for on / off control of the lower arm switching elements 4, 5, 6 is lower than the voltage level of the DC power supply 24, and the lower arm switching element 4 , 5 and 6 are not connected to the low-voltage side drive circuit.

次に動作について説明する。
制御部１９は、汎用出力ポートから直流電源２４の電圧以下のＨ信号とＬ信号(駆動信号)を出力する。前述したように制御電源２４がＤＣ５Ｖの場合、Ｈ信号は約５Ｖ、Ｌ信号は約０Ｖとなる。上アームスイッチング素子１，２，３においては、高圧側駆動回路１３，１４，１５によって変換されたオン動作電圧のＨ信号と約０ＶのＬ信号の入力に基づいてオン／オフし、下アームスイッチング素子４，５，６においては、約５ＶのＨ信号と約０ＶのＬ信号の入力に基づいてオン／オフし、直流電源２２の直流電圧を交流電圧に変換してモーター２５に供給する。駆動信号のＨやＬといった論理とスイッチング素子のオン／オフの関係はスイッチング素子１〜６の特性により決まる。 Next, the operation will be described.
The control unit 19 outputs an H signal and an L signal (drive signal) that are equal to or lower than the voltage of the DC power supply 24 from the general-purpose output port. As described above, when the control power supply 24 is DC 5V, the H signal is about 5V and the L signal is about 0V. The upper arm switching elements 1, 2, 3 are turned on / off based on the input of the H signal of the ON operation voltage converted by the high-voltage side drive circuits 13, 14, 15 and the L signal of about 0 V, and the lower arm switching The elements 4, 5 and 6 are turned on / off based on the input of the H signal of about 5V and the L signal of about 0V, and the DC voltage of the DC power supply 22 is converted into an AC voltage and supplied to the motor 25. The relationship between the logic such as H and L of the drive signal and the ON / OFF state of the switching element is determined by the characteristics of the switching elements 1 to 6.

このように構成されたモーターの制御装置においては、制御部１９と下アームスイッチング素子４，５，６との間にはゲートに流れ込む電流を調整する抵抗１６，１７，１８などごく少数の部品しかないため、構成部品が少なく部品コストが少なくてすみ、また、これらの部品を基板に実装する際には部品が基板に占める実装面積を小さくすることができる。   In the motor control apparatus configured as described above, there are only a few components such as resistors 16, 17 and 18 for adjusting the current flowing into the gate between the control unit 19 and the lower arm switching elements 4, 5 and 6. Therefore, the number of components is small and the component cost is low, and when these components are mounted on the substrate, the mounting area occupied by the components on the substrate can be reduced.

また、制御部１９からの駆動信号が出力されてから実際に下アームスイッチング素子４，５，６の状態が切り換わるまでの遅れ時間が小さく高速なスイッチング動作が可能となる。それにより、スイッチング損失が抑えられ省エネにつながる。   In addition, the delay time from when the drive signal from the control unit 19 is output until the state of the lower arm switching elements 4, 5, and 6 is actually switched is small, and a high-speed switching operation is possible. Thereby, switching loss is suppressed and it leads to energy saving.

また、遅れ時間が大きくなるとモーター２５の電流とインバータ回路からの出力電圧の位相ずれ大きくなり、モーター損失が増加するが、それも抑えることができ結果として省エネ制御が可能となる。   Further, when the delay time is increased, the phase shift between the current of the motor 25 and the output voltage from the inverter circuit is increased, and the motor loss is increased. However, it can be suppressed and energy saving control can be performed as a result.

さらに、高速なスイッチング動作が可能となるため、上アームと下アームの各スイッチング素子１〜６の短絡を防止するデッドタイムを極限まで小さく設定することができる。   Furthermore, since a high-speed switching operation is possible, the dead time for preventing a short circuit between the switching elements 1 to 6 of the upper arm and the lower arm can be set as small as possible.

なお、本実施の形態では、下アームスイッチング素子４，５，６を制御部１９の制御電圧以下でオン／オフさせるようにしたが、上アームスイッチング素子１，２，３も制御部１９の制御電圧以下でオン／オフできるようなスイッチング素子で構成してもよい。このように構成した場合、高圧側駆動回路１３，１４，１５の直流電源２３と制御部１９の直流電源２４を共通にすることができるので、例えばＤＣ５Ｖだけといった単電源で制御可能なインバータ回路を実現することができ、また、それによりＤＣ電源回路の構成部品が少なくでき、部品コストを抑えることができる。また、これらの部品を基板に実装する際には部品が基板に占める実装面積を小さくすることができる。   In this embodiment, the lower arm switching elements 4, 5, 6 are turned on / off below the control voltage of the control unit 19, but the upper arm switching elements 1, 2, 3 are also controlled by the control unit 19. You may comprise by the switching element which can be turned on / off below a voltage. In such a configuration, the DC power source 23 of the high-voltage side drive circuits 13, 14 and 15 and the DC power source 24 of the control unit 19 can be made common, so that an inverter circuit that can be controlled by a single power source such as only DC 5V, for example. This can be realized, and as a result, the number of components of the DC power supply circuit can be reduced, and the component cost can be reduced. Further, when these components are mounted on the substrate, the mounting area occupied by the component on the substrate can be reduced.

また、図２の破線で示すように、上アームと下アームの各スイッチング素子１〜６、フライホイールダイオード７〜１２、高圧側駆動回路１３，１４，１５、抵抗１６，１７，１８、電流検出用抵抗２０，増幅回路２１などの各部品で構成されたインバータ回路と制御部１９を１つのパッケージで構成しても良い。   Further, as indicated by broken lines in FIG. 2, the switching elements 1 to 6 of the upper arm and the lower arm, flywheel diodes 7 to 12, high-voltage side drive circuits 13, 14, and 15, resistors 16, 17, and 18, current detection The inverter circuit and the control unit 19 that are configured by components such as the resistor 20 and the amplifier circuit 21 may be configured as one package.

このように構成した場合、高集積化により小型化が可能になり、基板に実装する場合の作業が簡単で、基板占有面積を小さくすることができ、また、他の電子部品間の配線が容易になるなどの利点がある。   In such a configuration, downsizing is possible due to high integration, the work for mounting on a substrate is simple, the area occupied by the substrate can be reduced, and wiring between other electronic components is easy. There are advantages such as becoming.

また、直流電源２２の電圧が高く、モーター２５に流れる電流が大きくなると、上アームと下アームの各スイッチング素子１〜６やフライホイールダイオード７〜１２の電流の導通／非導通の切り替わりの際、急峻な電流変化（ｄＩ／ｄｔが大）が発生する。基板配線パターンの引き回しによりパターンインダクタンス（Ｌ）が大きくなると、Ｌ×ｄＩ／ｄｔによるノイズが発生するため、電流検出用抵抗２０からの電流検出結果によりモーター２５の制御を行う場合などに、前記ノイズにより誤動作を起こす可能性が大きくなる。このノイズの発生を抑えるためには、配線パターンの引き回しを短くする必要があるため、前述したように各種部品を１つのパッケージに組み込んで配線パターンを短くすれば、ノイズ耐力も上がりモーター制御装置の信頼性も向上する。   Further, when the voltage of the DC power source 22 is high and the current flowing through the motor 25 is increased, the currents of the switching elements 1 to 6 and the flywheel diodes 7 to 12 of the upper arm and the lower arm are switched between conduction / non-conduction. A steep current change (dI / dt is large) occurs. When the pattern inductance (L) increases due to the routing of the substrate wiring pattern, noise due to L × dI / dt is generated. Therefore, when the motor 25 is controlled based on the current detection result from the current detection resistor 20, the noise is increased. This increases the possibility of malfunction. In order to suppress the generation of this noise, it is necessary to shorten the routing of the wiring pattern. As described above, if various components are incorporated into one package and the wiring pattern is shortened, the noise resistance is increased and the motor control device Reliability is also improved.

また、本実施の形態では、下アームスイッチング素子４，５，６と直流電源２２の負極の間に電流検出用抵抗２０を設け、この電流検出用抵抗２０に流れる電流から発生する電圧を増幅する増幅回路２１を設けたことを述べたが、図３に示すように、下アームスイッチング素子４，５，６に電流検出用抵抗２７〜２９をそれぞれ接続し、電流検出用抵抗２７，２８，２９の反対側の端子を直流電源２２の負極に接続し、また、電流検出用抵抗２７，２８，２９それぞれに増幅回路２１(又はフィルタ回路）を設けるようにしても良い。このように構成した場合、図２で述べた効果に加えて、電流検出用抵抗２７，２８，２９が多いため、電流をより高精度に検出でき、信頼性の高いモーター制御が可能となる。   In the present embodiment, a current detection resistor 20 is provided between the lower arm switching elements 4, 5, 6 and the negative electrode of the DC power supply 22, and a voltage generated from the current flowing through the current detection resistor 20 is amplified. Although it has been described that the amplifier circuit 21 is provided, as shown in FIG. 3, current detection resistors 27 to 29 are connected to the lower arm switching elements 4, 5, and 6, respectively, and the current detection resistors 27, 28, and 29 are connected. The terminal on the opposite side may be connected to the negative electrode of the DC power source 22, and the amplifier circuit 21 (or filter circuit) may be provided in each of the current detection resistors 27, 28 and 29. In such a configuration, in addition to the effects described with reference to FIG. 2, the current detection resistors 27, 28, and 29 are many, so that the current can be detected with higher accuracy and highly reliable motor control is possible.

以上のように構成されたモーター制御装置を、エアコンや冷蔵庫などの冷凍空調装置に設けられた圧縮機やファンモーターの制御や、洗濯機、掃除機等の家電機器に設けられたモーターの制御に使用することができ、それにより安価な構成で信頼性が高く、省エネを実現したモーターの制御が可能となる。   The motor control device configured as described above can be used to control compressors and fan motors provided in refrigeration and air-conditioning equipment such as air conditioners and refrigerators, and motors provided in household appliances such as washing machines and vacuum cleaners. Therefore, it is possible to control a motor which is inexpensive and has high reliability and energy saving.

本発明の実施の形態に係るモーター制御装置を示す回路図である。It is a circuit diagram which shows the motor control apparatus which concerns on embodiment of this invention. 実施の形態の他の例を示すモーター制御装置の回路図である。It is a circuit diagram of the motor control apparatus which shows the other example of embodiment. 実施の形態の他の例を示すモーター制御装置の回路図である。It is a circuit diagram of the motor control apparatus which shows the other example of embodiment.

符号の説明Explanation of symbols

１，２，３ 上アームスイッチング素子、４，５，６ 下アームスイッチング素子、
７，８，９，１０，１１，１２ フライホイールダイオード、１３，１４，１５ 高圧側駆動回路、１６，１７，１８ 抵抗、１９ 制御部、２０ 電流検出用抵抗、２１ 増幅回路、２２ 直流電源、２３ 高圧側駆動回路用の直流電源、２４ 制御部用の直流電源、２５ モーター、２６ パッケージ、２７，２８，２９ 電流検出用抵抗。 1, 2, 3 Upper arm switching element, 4, 5, 6 Lower arm switching element,
7, 8, 9, 10, 11, 12 Flywheel diode, 13, 14, 15 High voltage side drive circuit, 16, 17, 18 Resistor, 19 Control unit, 20 Current detection resistor, 21 Amplifier circuit, 22 DC power supply, 23 DC power supply for high-voltage side drive circuit, 24 DC power supply for control unit, 25 motor, 26 package, 27, 28, 29 Current detection resistor.

Claims (5)

直流電源の正極と負極との間に３相ブリッジ接続され、出力側にモーターが接続される上アームと下アームの各スイッチング素子、上アームと下アームの各スイッチング素子にそれぞれ逆並列に接続されたダイオード、上アームの各スイッチング素子をそれぞれ駆動する駆動回路、下アームの各スイッチング素子及び前記ダイオードを介して流れるモーターの電流を検出する電流検出手段を有するインバータ回路と、
上アームと下アームの各スイッチング素子の駆動信号を生成する制御部とを備え、
下アームの各スイッチング素子として制御部の制御電圧で駆動可能なものを用いたことを特徴とするモーター制御装置。 A three-phase bridge connection is made between the positive and negative electrodes of the DC power supply, and the upper and lower arm switching elements connected to the motor on the output side, and the upper and lower arm switching elements are connected in antiparallel. An inverter circuit having a current detection means for detecting a current of a motor flowing through the diode, a driving circuit for driving each switching element of the upper arm, each switching element of the lower arm, and the diode;
A control unit that generates a drive signal for each switching element of the upper arm and the lower arm,
A motor control device using a switching device of a lower arm that can be driven by a control voltage of a control unit. 前記制御部は、駆動回路を介在させないで前記下アームの各スイッチング素子に駆動信号を出力して駆動することを特徴とする請求項１記載のモーター制御装置。   The motor control device according to claim 1, wherein the control unit is driven by outputting a drive signal to each switching element of the lower arm without interposing a drive circuit. 前記インバータ回路及び前記制御部を１つのパッケージで構成したことを特徴とする請求項１又は２記載のモーター制御装置。   The motor control device according to claim 1, wherein the inverter circuit and the control unit are configured as one package. 請求項１乃至３の何れかに記載のモーター制御装置を備えたことを特徴とする冷凍空調装置。   A refrigerating and air-conditioning apparatus comprising the motor control device according to any one of claims 1 to 3. 請求項１乃至３の何れかに記載のモーター制御装置を備えたことを特徴とする家電機器。   A home appliance comprising the motor control device according to any one of claims 1 to 3.
JP2008293589A 2008-11-17 2008-11-17 Motor controller and refrigerator/air-conditioner and household electrical appliances using the controller Pending JP2010124540A (en)

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JP2008160950A (en) * 2006-12-22 2008-07-10 Matsushita Electric Ind Co Ltd Motor driver and refrigerator possessing it

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JP2007318873A (en) * 2006-05-24 2007-12-06 Daiwa Industries Ltd Pwm motor driving circuit
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015050411A1 (en) * 2013-10-04 2015-04-09 Lg Electronics Inc. Inverter module for driving a plurality of compressors and method for controlling the same
CN105556823A (en) * 2013-10-04 2016-05-04 Lg电子株式会社 Inverter module for driving a plurality of compressors and method for controlling the same
US10371140B2 (en) 2013-10-04 2019-08-06 Lg Electronics Inc. Inverter module for driving a plurality of compressors and method for controlling the same

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