公开(公告)号：DE69510509D1

公开(公告)日：1999-08-05

申请号：DE69510509

申请日：1995-08-23

Applicant: MATSUSHITA ELECTRIC IND CO LTD ,  MATSUSHITA REFRIGERATION

Inventor： DOYAMA YOSHIAKI ,  MATSUI KEIZO ,  ITO YOSHITERU ,  YOSHIOKA KANEHARU ,  OGATA HIDEO ,  YOSHIDA IZUMI ,  WATAKABE SHUSAKU

IPC: G01P3/48 ,  H02P23/08 ,  H02P5/408

Abstract: An inverter control apparatus for controlling a command frequency (f1) and a command voltage (V1) to be supplied to an inverter (2) which then supplies AC power of a desired frequency determined by the command frequency and the command voltage to an induction motor (1). The inverter control apparatus receives a requested rotational speed (fref) of the motor and an actual rotational speed (f') obtained by detecting a frequency of a fluctuation component of a drive current supplied from the inverter (2) to the induction motor (1). A difference between the requested rotational speed and the actual rotational speed represents a slip amount, which is added to the requested rotational speed to produce a command frequency. The command voltage is set to a voltage when the monitored drive current is at a minimum value.

公开(公告)号：DE69510509T2

公开(公告)日：2000-05-04

申请号：DE69510509

申请日：1995-08-23

Applicant: MATSUSHITA ELECTRIC IND CO LTD ,  MATSUSHITA REFRIGERATION

Inventor： DOYAMA YOSHIAKI ,  MATSUI KEIZO ,  ITO YOSHITERU ,  YOSHIOKA KANEHARU ,  OGATA HIDEO ,  YOSHIDA IZUMI ,  WATAKABE SHUSAKU

IPC: G01P3/48 ,  H02P23/08 ,  H02P5/408

Abstract: An inverter control apparatus for controlling a command frequency (f1) and a command voltage (V1) to be supplied to an inverter (2) which then supplies AC power of a desired frequency determined by the command frequency and the command voltage to an induction motor (1). The inverter control apparatus receives a requested rotational speed (fref) of the motor and an actual rotational speed (f') obtained by detecting a frequency of a fluctuation component of a drive current supplied from the inverter (2) to the induction motor (1). A difference between the requested rotational speed and the actual rotational speed represents a slip amount, which is added to the requested rotational speed to produce a command frequency. The command voltage is set to a voltage when the monitored drive current is at a minimum value.

公开(公告)号：JP2002000469A

公开(公告)日：2002-01-08

申请号：JP2000190342

申请日：2000-06-23

Applicant: MATSUSHITA REFRIGERATION

Inventor： UEDA YOSHIHIRO ,  FUJIMOTO SHINJI ,  INAMORI SHOHEI ,  YOSHIDA IZUMI

IPC: A47J43/044 ,  A47J43/042

Abstract: PROBLEM TO BE SOLVED: To provide a food product producing device, which relates to a device for producing food products in a juice or semifrozen state, facilitates a tooling change, and permits prompt producing of various kinds of food products. SOLUTION: This food producing device 1 includes a body portion 6 into which a cold storage portion 2, a mixing portion 3, and a washing portion 5 are all integrated. The mixing portion 3 is provided with a clutch 37 for outputting the rotational force outside. A stiring blade 32 for stiring foodstuffs is made attachable and detachable to and from the body portion. The clutch 37 is made vertically movable to the body portion. The clutch 37 is moved to connect with the stiring blade 32 for rotating the same.

公开(公告)号：JP2000295855A

公开(公告)日：2000-10-20

申请号：JP9630699

申请日：1999-04-02

Applicant: MATSUSHITA REFRIGERATION

Inventor： WATAKABE SHUSAKU ,  YOSHIDA IZUMI

IPC: H02M7/12

Abstract: PROBLEM TO BE SOLVED: To enable an air conditioner to suppress the waveform distortion of an input current under all loaded conditions by setting a chopping frequency to an appropriate on-duty by adjusting the frequency as necessary while confirming the fifth higher harmonics of an actual input current. SOLUTION: An air conditioner is composed of a chopper section 13 which is constituted of two switching elements as a power converting device, a power converter 9 which converts the output of the chopper section 13 to an arbitrary frequency and voltage, and an input current detector 6. The air conditioner is also composed of a frequency analyzing section 5 which detects the fifth higher harmonics of an input current, a chopper control section 8, and an on-duty monitoring section 4 which outputs a chopping frequency adjusting command from the on-duty of a pulse. In addition, the air conditioner is also composed of a chopping frequency commanding section 7 which adjusts the chopping frequency command value so that the fifth higher harmonics of the input current may become the upper limit value of fifth higher harmonics or lower from the chopping frequency adjusting command and the upper limit value of the fifth higher harmonics. Since the chopping frequency is adjusted so that the fifth higher harmonic level may become lower in accordance with the load, the distortion factor of the input current can be lowered regardless of the load.

公开(公告)号：JPH11341879A

公开(公告)日：1999-12-10

申请号：JP14900498

申请日：1998-05-29

Applicant: MATSUSHITA REFRIGERATION

Inventor： YOSHIDA IZUMI

IPC: H02P27/06 ,  H02P7/63

Abstract: PROBLEM TO BE SOLVED: To provide a vibration reducing device for a low-priced airconditioner, which eliminates the need for a detector for detecting a current flowing particularly between a DC power supply and a power converter, by determining running and regeneration for the purpose of control in the secondary side output of a switching power supply, which generates the power for driving IGBT of an inverter normally mounted to an airconditioner including an inverter. SOLUTION: This apparatus is constituted of a power converter 5 for converting a DC power supply 4 to an AC power supply of variable frequency, an induction motor 1 which is controlled in the number of revolutions, a switching power supply 6 for IGBT drive as the power supply of a switching element of the power converter 5, a voltage variation detecting means 13 for detecting hunting output generated in the secondary side output of the switching power supply 6 for driving IGBT, a voltage variation detecting means 16 for extracting hunting element, and a waveform arithmetic means 21 for changing the basic frequency command value depending on such an output. As a result, it is possible to reduce the hunting element generated in a compressor, without the use of a particular detector.

公开(公告)号：JPH10141739A

公开(公告)日：1998-05-29

申请号：JP29351996

申请日：1996-11-06

Applicant: MATSUSHITA REFRIGERATION

Inventor： YOSHIDA IZUMI ,  OGATA HIDEO

IPC: F04B49/06 ,  F24F11/02 ,  F25B1/00

Abstract: PROBLEM TO BE SOLVED: To obtain a sufficient heating value by a simple method, and in addition, perform a heating which is suitable for an environmental condition for a pre-heating method of a compressor when a compression means stops. SOLUTION: When a compression means stops, for a power source converting means 20, two phases of a three phase output terminal, are made equal to a negative electric potential of a DC voltage, and the remaining phase is made a first electric potential for a first state. Also, the two phases are made equal to a positive electric potential of the DC voltage, and the remaining phase is made a second electric potential for a second state. When a temperature which is obtained by a compressor temperature detecting means 13, is lower than a control starting temperature, a wave shape by which the frist state and the second state are repeated by a certain cycle, is transmitted from a control means 3, and by doing so, a pre-heating of a compressor 2 is made possible, and in addition, by obtaining a temperature information by the compressor temperature detector 13 and an indoor unit peripheral temperature detector 14, the pre-heating of the compressor 2, which is suitable for an environmental condition, can be performed.

公开(公告)号：JPH09182493A

公开(公告)日：1997-07-11

申请号：JP34143095

申请日：1995-12-27

Applicant: MATSUSHITA ELECTRIC IND CO LTD ,  MATSUSHITA REFRIGERATION

Inventor： ITO YOSHITERU ,  TSUCHIYAMA YOSHIRO ,  MATSUI KEIZO ,  YOSHIOKA KANEHARU ,  OGATA HIDEO ,  YOSHIDA IZUMI ,  WATAKABE SHUSAKU

IPC: H02P27/08 ,  H02P27/06 ,  H02P7/63

Abstract: PROBLEM TO BE SOLVED: To perform current limitation control stably and quickly to the change of an operation current value, in full range of operation range, by performing the gain compensation using the primary formula of limited frequency, for the quantity of change of the limited frequency to a motor for a compressor. SOLUTION: A limited frequency computing unit 11 computes stageless limited frequency F1td-f(k) by the sampling value I(k), the command frequency Fset(k) (=Fset), and the tolerable current value Iset(k) (=Iset) from a current measuring instrument 10, and the limited frequency being the last control operation result from a limited frequency storage 12. A gain compensator and processor 18 performs gain compensation by the quantity dFdef-f(k) of the change of limited frequency and the limited frequency F1td(k) stored in the limited frequency storage 12. This computes the quantity dFdef-g(k) of the change of the compensation frequency limitation. Hereby, gain varies with operation frequency can be obtained, and proper current limitation control can be performed.

公开(公告)号：JPH09113039A

公开(公告)日：1997-05-02

申请号：JP26672995

申请日：1995-10-16

Applicant: MATSUSHITA REFRIGERATION ,  MATSUSHITA ELECTRIC IND CO LTD

Inventor： WATAKABE SHUSAKU ,  OGATA HIDEO ,  YOSHIDA IZUMI ,  TSUCHIYAMA YOSHIRO ,  MATSUI KEIZO ,  ITO YOSHITERU ,  YOSHIOKA KANEHARU

IPC: F25B1/00

Abstract: PROBLEM TO BE SOLVED: To heat a compressor and eliminate a useless consumption of electrical power only when refrigerant is being liquified by a method wherein a state of refrigerant is estimated in response to a discharging temperature and a discharging pressure of a compressor, a chopping wave-form is outputted in response to the estimated output and an output of a frequency instruction part of the compressor so as to drive the compressor. SOLUTION: Each of an output of a discharging pipe temperature sensor 11 for use in sensing a discharging temperature of a compressor 1 and an output of a pressure sensor 12 for use in sensing a discharging pipe pressure is inputted to a refrigerant state estimating means 13. The refrigerant stateestimating means 13 outputs ON indicating that the refrigerant is liquified in the case that the discharging pipe pressure is A1 and a discharging pipe temperature T1 at that time is lower than a saturation temperature Tα of the refrigerant. If the temperature is lower than the saturation temperature Tα, it may output ON indicating that the refrigerant is liquified. In addition, if the temperature is higher than the saturation temperature Tα, it is estimated that all the refrigerants are in gas state so as to output OFF. A control circuit 6 has as its input, an ON output fed from the refrigerant state estimating means 13 and an output of the frequency instruction part 14 for outputting a frequency driving the compressor 1, outputs a chopping wave-form to a frequency variable setting device 5 so as to heat the compressor 1.

公开(公告)号：JPH08247558A

公开(公告)日：1996-09-27

申请号：JP28659194

申请日：1994-11-21

Applicant: MATSUSHITA REFRIGERATION

Inventor： YOSHIDA IZUMI ,  WATAKABE SHUSAKU

IPC: F04B49/06 ,  F25B1/00 ,  H02P21/00 ,  H02P21/02 ,  H02P21/14 ,  H02P21/20 ,  H02P21/22 ,  H02P23/02 ,  H02P23/08 ,  H02P23/14 ,  H02P27/04 ,  H02P27/06 ,  H02P5/41

Abstract: PURPOSE: To obtain an excitation electric current value which matches with a load by determining an enthalpy of work to be done by a compressor and converting the determined enthalpy into torque and obtaining an excitation current value equivalent to the converted torque value in a control system which increases and decreases the rotary speed of the compressor by using an inverter device. CONSTITUTION: Each output signal of a shell discharge pressure detector 44, a shell discharge temperature detector 56, a shell suction pressure detector 46 and a shell suction temperature detector 47 is inputted into a first enthalpy operator 48 where workload AW of a compressor 1 is operated. Then, a first load torque estimating instrument 48 estimates a required load torque from the workload AW of the compressor and estimates an optimum energizing electric current from the load torque with an excitation electric current setting instrument 50, thereby outputting an excitation electric current setting value to a first vector control signal command arithmetic operation circuit 51. This arithmetic operation circuit 51 inputs a U phase and a V phase electric current measured value from the electric current detectors 42 and 43, and controls an electric current converter 13 by computing a torque electric current from these measured values and exitation electric current setting values.

公开(公告)号：JPH07305884A

公开(公告)日：1995-11-21

申请号：JP9486694

申请日：1994-05-09

Applicant: MATSUSHITA REFRIGERATION

Inventor： WATAKABE SHUSAKU ,  OGAWA KEIJI ,  YOSHIDA IZUMI

IPC: F24F11/02 ,  H02M7/48 ,  H02P27/06 ,  H02P7/63

Abstract: PURPOSE:To obtain a control device of an air conditioner which relates to restriction of a rush current flowing into an electrolytic capacitor at the time when an inverter power supply is made and which effects miniaturization of a device for charging the electrolytic capacitor, prevents wasteful power consumption and operates safely. CONSTITUTION:A rush current restricting circuit 17 comprising an electromagnetic contactor 14 wherein three main terminals and two auxiliary terminals operate reversely, a charge current restricting resistor 15 and a rush current restricting relay 16 is provided, and the rush current restricting relay 16 is turned ON only when an electrolytic capacitor 6 is charged in the initial stage of operation.