Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
  • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
  • H02P6/04—Arrangements for controlling or regulating the speed or torque of more than one motor
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
  • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
  • H02P6/08—Arrangements for controlling the speed or torque of a single motor
  • H02P6/085—Arrangements for controlling the speed or torque of a single motor in a bridge configuration
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
  • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
  • H02P6/14—Electronic commutators
  • H02P6/16—Circuit arrangements for detecting position
  • H02P6/18—Circuit arrangements for detecting position without separate position detecting elements
  • H02P6/182—Circuit arrangements for detecting position without separate position detecting elements using back-emf in windings

Definitions

• the present invention relates to a brushless motor, and in particular, detects a relative position between a magnet rotor and an armature winding based on an induced voltage induced in an armature winding, and quickly changes the rotation speed while responding to a load. than it also relates ⁇ driving method and a driving device for a brushless motor of the line of Utame.
• a brushless motor requires a detector to detect the magnetic pole position of its rotor.
• the reliability of the detector under high temperature and high pressure conditions Cannot be used & these detectors cannot be used.
• the voltage signal induced in the armature winding is detected without using the magnetic pole position detector, and the commutation signal of the motor is based on it.
• the generation method is used.
• the rotational speed is detected based on the commutation signal. As shown in FIG. 1, the motor is driven while always performing feedback control in order to cope with a load change.
• the present invention includes a three-phase armature winding connected to a neutral point, non-ground, a DC power supply, a semiconductor switching element group that blocks and interrupts current to the armature winding, and a magnet rotor.
• a drive signal generation means for generating a drive signal for the switching element group using an output signal of the position detection means; a rotation speed judging by using an output signal of the position detection means;
• a rotation speed comparison unit that compares the rotation speed with the rotation speed, a duty command unit, and a pulse width modulation unit that performs pulse width modulation on an output signal of the drive signal generation unit based on a command from the duty command unit.
• the duty when the rotation speed is changed, the duty is changed based on a predetermined rotation speed-duty curve, and when the rotation speed is stable, the duty is changed based on a signal obtained by converting the voltage signal.
• the feedback control is changed, and the inclination of a predetermined rotation speed-duty curve is changed between low rotation and high rotation.
• the duty based on the predetermined rotation speed / duty curve is adopted.
• the adopted duty is changed one after another at an arbitrary speed. In this way, a brushless motor drive that can change the rotation speed smoothly and quickly while responding to the load is realized.
• FIG. 1 shows the relationship between the rotation speed and the duty of the conventional brushless motor driving device.
• Fig. 2 shows the block diagram of the brushless motor driving device in the first and second embodiments.
• Fig. 3 shows the brushless motor driving device.
• FIG. 4 is a flow chart for explaining the operation of this embodiment.
• FIG. 5 is a diagram showing the relationship between the rotational speed and the duty in the first embodiment of the present invention.
• FIG. 7 is a relationship diagram of rotation speed and duty in the embodiment of FIG.
• FIG. 2 is a block diagram of a brushless motor driving device according to the first embodiment of the present invention.
• 101 is a DC power supply
• 102 is a group of semiconductor switching elements
• six transistors Q1 to Q6 are connected to six diodes connected in anti-parallel to each other. It consists of codes.
• Reference numeral 103 denotes a brushless motor, which is composed of an armature winding 104 connected in three phases and a magnet rotor 105.
• 106 is position detection means
• 107 is drive signal generation means
• 108 is pulse width modulation means
• 109 is rotation speed command means
• 110 is rotation speed comparison means
• 111 is duty command. Means.
• the position detecting means 106 detects the magnetic pole position of the magnet rotor 105 from the induced voltage generated in the armature winding 104, and transmits it to the drive signal generating means 107, and the pulse It controls the brushless motor 103 by driving the transistors of the semiconductor switching element group 102 by applying width modulation.
• FIG. 3 is a circuit diagram of a brushless motor driving device according to the first embodiment of the present invention.
• 1 is a DC power supply
• 2 is a group of semiconductor switching elements, and consists of six transistors Q1 to Q6 and six diodes connected in anti-parallel to each of them.
• Reference numeral 3 denotes a brushless motor, which comprises an armature winding 4 and a magnet rotor 5 connected in three phases.
• Reference numeral 6 denotes a position detection circuit, which comprises three filters 6 1 to 6 3 and a comparator group 6 4.
• 7 is a microcomputer
• 8 is a pulse width modulation circuit
• 9 is a volume for indicating a rotation speed.
• the comparator group 64 is connected to the input ports IN 0 to IN 2 of the microcomputer 7.
• a drive signal is output from output ports U, V, W, X, ⁇ , and ⁇ of the microcomputer 7, U to V are connected to the pulse width modulation circuit 8, and X to Z are the semiconductor switching elements described above. Connected to transistors Q4 to Q6 of group 2.
• the output port of the microcomputer 7 A duty signal is output from the PWM and is connected to the pulse width modulation circuit 8. The output of the pulse width modulation circuit 8 is connected to transistors Q1 to Q3 of the semiconductor switching element group 2.
• FIG. 4 is a flowchart showing the software of the microcomputer 7.
• Fig. 5 shows the rotation speed-duty chart, and the dashed line indicates feed pack control.
• step A the target rotation speed according to the input voltage level of input port IN 3 is determined.
• step B the target rotational speed is compared with the instructed rotational speed. If they match, the process proceeds to step F. If they differ, the process proceeds to step C.
• step C the target rotation speed is compared with the indicated tillage speed. If the target rotation speed is higher than the indicated rotation speed, proceed to step E ⁇ if the target rotation speed is lower than the indicated rotation speed, step D Proceed to.
• step D a value obtained by subtracting an arbitrary value ⁇ from the designated rotation speed is set as the designated rotation speed.
• step ⁇ a value obtained by adding an arbitrary value ⁇ to the designated rotation speed is set as the designated rotation speed.
• Optimum up / down speed for changing the rotation speed is selected by appropriately selecting the value to be adjusted in steps D and E. Also, the value of ⁇ to be adjusted in steps D and E is not always the same.
• step F if the target rotational speed is compared with the instructed rotational speed, the process proceeds to step I. If not, the process proceeds to step G.
• Step G The basic duty data corresponding to the rotation speed is loaded from the table data in which the predetermined rotation speed-duty is written.
• step H add the correction duty data to the basic duty data and set the output duty data. Then go to step ⁇ .
• the operation in steps F, G, H, and 0 is performed when the rotation speed is changed.
• step I the actual rotational speed calculated from the position detection signal is compared with the target rotational speed. If not, the process proceeds to step M if the process proceeds to step M.
• step J the target rotation speed is compared with the actual rotation speed.If the target rotation speed is higher than the actual rotation speed, the process proceeds to step L.If the target rotation speed is lower than the actual rotation speed, step K is performed. Proceed to.
• step K the value obtained by subtracting any value 3 from the output duty cycle is set as output duty data.
• step L the output duty data plus an arbitrary value ⁇ is set as the output duty data.
• step M the basic duty data corresponding to the specified rotation speed is loaded from the table data in which the predetermined rotation speed and duty are written.
• step N the basic duty data is subtracted from the output duty data, and the result is set as the correction duty data.
• This corrected duty data corresponds to h1 and h2 in FIG. Steps I, J, K, L, M, and N operate in this manner when the rotation speed is stable. Performs feedback control of the In step 2, a pulse is output from the output port PWM according to the output duty data. Thereafter, the process returns to step A and repeats the above processing.
• the duty ratio can be controlled in parallel with the rotation speed-duty curve as a base when the rotation speed is changed, by changing the inclination between the low rotation speed and the high rotation speed as shown in FIG. Other operations are the same as in the first embodiment.
• the point of the rotation speed ( ⁇ ) in Fig. 6 is ⁇
• the intensity of the rotation ( ⁇ ) is light and the correction duty data h4 is negative: L Motor drive

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Control Of Motors That Do Not Use Commutators (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=12410926

Family Applications (1)

Country Status (4)

Families Citing this family (4)

Citations (1)

Family Cites Families (2)

• 1990
  • 1990-02-14 JP JP2034322A patent/JP2876681B2/ja not_active Expired - Fee Related
• 1991
  • 1991-02-12 DE DE19914190248 patent/DE4190248T/de active Pending
  • 1991-02-12 DE DE4190248A patent/DE4190248C2/de not_active Expired - Fee Related
  • 1991-02-12 KR KR1019910701343A patent/KR940009211B1/ko not_active IP Right Cessation
  • 1991-02-12 WO PCT/JP1991/000162 patent/WO1991012654A1/ja active Application Filing

Patent Citations (1)

Also Published As

Similar Documents

Legal Events