Abstract:
Die Erfindung betrifft ein Verfahren zum Betreiben einer Ansteuereinheit für einen Elektromotor, wobei die Ansteuereinheit eine Ansteuerschaltung zum Ansteuern des Elektromotors und eine der Ansteuerschaltung vorgeschalteten Zwischenkreisschaltung, insbesondere mit einer Zwischenkreiskapazität, aufweist, mit folgenden Schritten: - Bereitstellen einer Stellgröße (SG) zum Ansteuern des Elektromotors (2); - Einstellen einer variablen Eingangsspannung (U DC ) und Bereitstellen der eingestellten Eingangsspannung (U DC ) über die Zwischenkreisschaltung an die Ansteuereinheit (3); - Betreiben der Ansteuerschaltung (3) abhängig von einer zur Verfügung stehenden Zwischenkreisspannung (U C ), die von der eingestellten Eingangsspannung (U DC ) abhängt, und abhängig von der Stellgröße (SG), um den Elektromotor (2) entsprechend der Stellgröße (SG) anzusteuern.
Abstract:
A control device (30) calculates an upper limit value of a duty ratio (DR_Ulim) according to a voltage (Vm) from a voltage sensor (13) and a threshold voltage (OVb) when an overvoltage is determined to have been applied to a battery (B), and determines a duty ratio (DR) for providing switching control to NPN transistors (Q1, Q2) in a range lower than the calculated upper limit value of the duty ratio (DR_Ulim). The control device (30) uses the determined duty ratio (DR) to provide switching control to the NPN transistors (Q1, Q2). Then, an up-converter (12) converts a direct current voltage (Vb) from the battery (B) into the output voltage (Vm) such that an overvoltage is not applied to the battery (B).
Abstract:
On end of a reactor (L1) is connected to a positive electrode of a battery (B1) and the other end is connected to a power line via a transistor (Q1) and to the ground via a transistor (Q2). By PWM control of the transistors (Q1, Q2), an arbitrary increased voltage is obtained in the power line. It is possible to obtain an optimal inverter input voltage (power line voltage) according to the motor drive state, thereby increasing efficiency. Thus, it is possible to optimize the inverter input voltage according to the motor drive condition.
Abstract:
A vehicle includes a converter (12) for stepping up power provided from a power storage device, and an inverter (14) for converting the power output from converter (12) and outputting it to an alternating-current motor (M1) for driving the vehicle. In the vehicle, a rectangular voltage control unit (3300) controls the inverter (14) by means of rectangular wave voltage control that is based on a torque command value (Trqcom) and the like, so as to control an output torque of the alternating-current motor (M1). A system voltage control unit (3400) controls a system voltage (VH), which is an output voltage of the converter (12). The system voltage control unit (3400) lifts a restriction on a system voltage command value (VHcom) based on an accelerator pedal position and the like, and then increases it. When increasing the system voltage command value (VHcom) during the rectangular wave voltage control for the inverter (14), a cooperative control unit (3500) increases the system voltage command value (VHcom) and the torque command value (Trqcom) in a cooperative manner.
Abstract:
The present invention provides a power supply device for an electric vehicle that allows highly efficient operation of a compressor inverter. A power supply device for motor vehicle 10 has: a main circuit 13 having a power source 11, a DC-DC converter 18, and a main inverter 17 that drives a main motor 12; an auxiliary circuit 15 having an auxiliary inverter 19 that drives an auxiliary motor 14, a first electrical circuit 23 that is connected to the main circuit 13 on a primary side of the DC-DC converter 18, a second electrical circuit 24 that is connected to the main circuit 13 on a secondary side of the DC-DC converter 18, and a connection circuit 30 configured to be capable of selecting one of the first electrical circuit 23 and the second electrical circuit 24 as a path for supplying a direct current voltage to the auxiliary inverter 19; and a control device 16 that controls the connection circuit 30 when the main motor 12 is in power running operation so that switching between the first electrical circuit 23 and the second electrical circuit 24 is performed corresponding to a required voltage of the auxiliary inverter 19.
Abstract:
An ECU (60) activates a shutdown permission signal (RG) and provides it to an AND gate (50) when a shutdown signal (DWN) is inactive. Thus, when an abnormality sensing device (40) does not sense an abnormality, the ECU (60) always keeps the shutdown permission signal (RG) active. The AND gate (50) performs logical AND between a signal (OVL) provided from the abnormality sensing device (40) and the shutdown permission signal (RG) to provide the shutdown signal (DWN) to inverters (20 and 30). When a limp-home run permission signal (BLS) becomes active while the shutdown signal (DWN) is active, the ECRU (60) inactivates the shutdown permission signal (RG).