JPS6454778U

JPS6454778U -

Info

Publication number: JPS6454778U
Application number: JP1987146472U
Authority: JP
Priority date: 1987-09-28
Filing date: 1987-09-28
Publication date: 1989-04-04
Anticipated expiration: 2002-09-28
Also published as: JPH0626078Y2

Description

[Brief explanation of the drawing]

第１図は本考案の実施例に用いる可変空隙モー
タを示す概略構成図、第２図は本考案の実施例を
示す回路図、第３図はＰＷＭ制御を説明するため
の波形図、第４図は従来の可変空隙モータを示す
概略構成図、第５図は従来の可変空隙モータに入
力する三相交流電流を示す波形図、第６図〜第８
図は可変空隙モータの特性を説明するための説明
図、第９図は従来の可変空隙モータのトルク特性
を示す特性図である。図面中、１０は可変空隙モータ、１１はステー
タ、１２はロータ、２０は位置検出回路、３０は
メモリ装置、４０は乗算器、５０はドライバ回路
、Ｃ_０，Ｃ_１，Ｃ_２…Ｃ_ｎはコイル、Ａは公転位
置信号、Ｄは励磁指令、Ｔはトルク指令、Ｄ′は
乗算励磁指令である。 FIG. 1 is a schematic configuration diagram showing a variable gap motor used in an embodiment of the present invention, FIG. 2 is a circuit diagram showing an embodiment of the present invention, FIG. 3 is a waveform diagram for explaining PWM control, and FIG. The figure is a schematic configuration diagram showing a conventional variable gap motor, Figure 5 is a waveform diagram showing three-phase AC current input to the conventional variable gap motor, and Figures 6 to 8
The figure is an explanatory diagram for explaining the characteristics of a variable gap motor, and FIG. 9 is a characteristic diagram showing the torque characteristics of a conventional variable gap motor. In the drawing, 10 is a variable air gap motor, 11 is a stator, 12 is a rotor, 20 is a position detection circuit, 30 is a memory device, 40 is a multiplier, 50 is a driver circuit, C ₀ , C ₁ , C ₂ . . . C _n is In the coil, A is a revolution position signal, D is an excitation command, T is a torque command, and D' is a multiplication excitation command.

Claims

[Claims for Utility Model Registration] A stator made of magnetic material is installed in a stator in which a large number of independent coils are installed circumferentially to generate an electromagnetic attraction force when a voltage controlled by pulse frequency modulation is applied and a current flows. A variable gap motor is provided with a rotor that rotates along the circumferential direction of the stator in a direction opposite to the rotation by rolling and rotating on the inner circumferential surface of the stator; A position detection circuit detects the revolution position of the rotor of a variable air gap motor by detecting wave components and comparing the values of harmonic components for each coil, and outputs a revolution position signal indicating the revolution position; Coil excitation patterns for exciting the required coils with the required magnitude so that the electromagnetic attraction of the rotor by the coils is maximized are stored in advance, corresponding to each revolution position of the rotor, and the revolution position signal is input. a memory device that outputs an excitation command containing as information the coils specified by the coil excitation pattern corresponding to the rotor revolution position at that time and the excitation value of each coil; and the excitation value of the excitation command input from the memory device. A multiplier that outputs a multiplication excitation command that includes as information the multiplication excitation value obtained by the multiplication and a specific coil to be excited by multiplying the multiplication excitation value obtained by the multiplication by a torque command input from the outside; A variable air gap characterized by comprising: a driver circuit that individually applies a pulse frequency modulated voltage to each specific coil of the stator indicated by the excitation command so as to have an average voltage of a value corresponding to a multiplied excitation value; motor device.