Honda Motor Co., Ltd.

Honda Giken Kogyo Kabushiki Kaisha

Hideki Inoue

Kota Kasaoka

Yuji Saito

Shigeru Tajima

Tetsu Sugiyama

Shugo Kondo

Hisayoshi Takahashi

Masaharu Hosoda

Yasuyuki Danjo

Toshihiro Sone

Junji Kato

Koji Sakai

When a short-circuit failure of any of switch portions () including switch elements () and parallel-connected feedback diodes () of an inverter circuit () is detected during the operation of a motor (), a switch portion () where the short-circuit failure has occurred is checked for whether it is on the positive polarity side or the negative polarity side. The switch elements () are so controlled that all the switch portions () on the same polarity side as where the short-circuit has occurred are brought into a conducted state and all the others are disconnected. This prevents a large electric current from flowing into each switch portion of the inverter circuit without requiring any switch to block the power distribution between a motor and the inverter circuit when a short-circuit failure of the switch portion of the inverter circuit occurs.

Controller for motor, and vehicle

Apparatus controlling a permanent magnet rotary electric machine. After the apparatus controls a current control portion, when a rotor of the machine rotates at a constant speed, to supply a predetermined current to an armature, the apparatus performs a dq vector control process by determining a predetermined temporarily set value as a magnetic pole position correction quantity while a d-axis current command value and a q-axis current command value in the dq vector control process performed on a dq coordinate system that has a d-axis extending in the direction of a magnetic field of the permanent magnet of the rotor and a q-axis extending in a direction perpendicular to the d-axis. Then, the apparatus obtains the magnetic pole position correction quantity based on a predetermined operation expression using the d-axis voltage command value and the q-axis voltage command value from the dq vector control process.

Apparatus for controlling permanent-magnet rotary electric machine

A controller of a permanent magnet type rotary motor of the present invention includes: a current difference calculator decomposing a primary voltage difference which is a difference between a primary voltage of the permanent magnet type rotary motor and a maximum voltage corresponding to a source voltage, into a field-axis voltage difference component and a torque-axis voltage difference component in the rotatory magnetic flux coordinate by the use of a phase angle of the primary voltage, and calculating a field-axis current difference component and a torque-axis current difference component in the rotatory magnetic flux coordinate by the use of the voltage difference component, a field-axis inductance, and a torque-axis inductance; and a target current corrector correcting a field-axis target current and a torque-axis target current in the rotatory magnetic flux coordinate so that current difference components are zero.

Controller and control method of permanent magnet type rotary motor

While a rotorof a permanent-magnet rotary machineis rotating and an armature current thereof is substantially zero, a motor controllerperforms a dq vector control process to control the permanent-magnet rotary machinein a dq coordinate system which has a d-axis representing the direction of a magnetic field of the rotorand a q-axis representing a direction perpendicular to the d-axis, and determines a magnetic pole position correcting quantity &#x3b8;ofs to correct a magnetic pole position &#x3b8;act detected by a magnetic pole position detectorso that a d-axis voltage command value Vdc determined by the dq vector control process will be substantially zero. The motor controllercontrols the phases of armature voltages Vuc, Vvc, Vwc with magnetic pole positions corrected by the magnetic pole position correcting quantity &#x3b8;ofs. Irrespective of whether the rotary machineis a cylindrical machine or a salient-pole machine, the detected values of magnetic pole positions are appropriately corrected according to a simple process without the need for a voltage detector for thereby efficiently controlling operation of the permanent-magnet rotary machine

Apparatus for controlling permanent-magnet rotary machine

An apparatus includes an insulated first switching element and a capacitor which are connected in series between one of positive and negative main circuit wirings connected to an ungrounded power source and a ground potential section (vehicle body); a second switching element with one terminal thereof connected to a junction point of the first switching element and the capacitor; switching element control device for selectively closing the first switching element for a predetermined time so as to charge the capacitor and for closing the second switching element so as to discharge the capacitor while the first switching element is opened; device for detecting the electric charge accumulated in the capacitor; and device for determining the insulation between the other of main circuit wirings and the ground potential section in accordance with the detected amount of charge.

Growing community of inventors

Wako, Japan

Hideki Inoue