阅读说明：本技术 旋转电机装置 (Rotating electric machine device ) 是由 阿久津悟 于 2018-03-02 设计创作，主要内容包括：提供一种旋转电机装置,即使一个直流电源产生了故障,也能使旋转电机输出转矩,并能根据直流电源电压的变化,使旋转电机的特性适当变化。旋转电机装置(1)包括：对低电压的直流电力和高电压的直流电力进行切换并输出的电源切换机构(23)；在第1绕组连接状态、与绕组的感应电压常数变得比第1绕组连接状态要低的第2绕组连接状态之间对多相绕组的相互连接进行切换的绕组连接切换机构(24)；具备开关元件的逆变器(12)；以及对电源切换机构(23)进行切换驱动、对绕组连接切换机构(24)进行切换驱动、并对开关元件进行导通截止驱动的控制装置(25)。(Provided is a rotating electric machine device which can make the rotating electric machine output torque even if one DC power supply fails, and can make the characteristics of the rotating electric machine change properly according to the change of the DC power supply voltage. A rotating electric device (1) is provided with: a power switching mechanism (23) that switches between and outputs low-voltage DC power and high-voltage DC power; a winding connection switching mechanism (24) for switching the connection of the multi-phase windings between a 1 st winding connection state and a 2 nd winding connection state in which an induced voltage constant with the winding is lower than that in the 1 st winding connection state; an inverter (12) provided with a switching element; and a control device (25) for switching and driving the power supply switching mechanism (23), switching and driving the winding connection switching mechanism (24), and switching on and off the switching elements.)

1. A rotating electric device characterized by comprising:

a 1 st power connection terminal, the 1 st power connection terminal being connected to a 1 st DC power supply;

a 2 nd power connection terminal connected to a 2 nd DC power supply having a voltage lower than that of the 1 st DC power supply;

a power supply switching mechanism that switches and outputs the dc power supplied to the 1 st power supply connection terminal and the dc power supplied to the 2 nd power supply connection terminal;

a rotating electric machine main body having a multi-phase winding;

a winding connection switching mechanism that switches the connection of the multiphase windings to each other between a 1 st winding connection state and a 2 nd winding connection state in which an induced voltage constant with the winding becomes lower than the 1 st winding connection state;

an inverter including a switching element that converts dc power output from the power switching mechanism and ac power supplied to the multiphase winding; and

and a control device that switches and drives the power supply switching mechanism, switches and drives the winding connection switching mechanism according to a switching state of the power supply switching mechanism, and controls the rotating electric machine main body by driving the switching elements to be turned on and off based on the switching state of the power supply switching mechanism and the switching state of the winding connection switching mechanism.

2. The rotating electric device according to claim 1,

the control device

Switching the winding connection switching mechanism so that the multiphase winding becomes the 1 st winding connection state when the power supply switching mechanism is switched to drive the connection on the 1 st power supply connection terminal side,

when the power supply switching mechanism is switched and driven to the connection on the 2 nd power supply connection terminal side, the winding connection switching mechanism is switched and driven so that the multiphase winding becomes the 2 nd winding connection state.

3. The rotating electric device according to claim 1 or 2,

the rotating electric machine main body has a three-phase winding as the multi-phase winding,

the winding connection switching mechanism is a switching mechanism that switches the interconnection of the three-phase windings between a Y connection that is the 1 st winding connection state and a Δ connection that is the 2 nd winding connection state.

4. The rotating electric device according to claim 1,

two groups of multi-phase windings, the winding connection switching mechanism and the inverter are arranged,

the winding connection switching mechanism of each phase switches the mutual connection of the multi-phase windings of the corresponding group between the 1 st winding connection state and the 2 nd winding connection state,

the control device switches and drives the power supply switching mechanism and switches and drives the winding connection switching mechanism of each group so that the multiphase winding of each group is in the 1 st winding connection state or the 2 nd winding connection state, and controls the rotating electric machine main body by driving the switching elements of each group to be turned on and off based on the switching state of the power supply switching mechanism and the switching state of the multiphase winding of each group in the winding connection switching mechanism of each group.

5. The rotating electric device according to claim 4,

the control device

Switching the winding connection switching mechanism of each group so that the multiphase winding of each group becomes the 1 st winding connection state when the power supply switching mechanism is switched to be driven to the connection on the 1 st power supply connection terminal side,

when the power supply switching mechanism is switched and driven to the connection on the 2 nd power supply connection terminal side, the winding connection switching mechanism of each group is switched and driven so that the multiphase winding of each group is in the 2 nd winding connection state.

6. The rotating electric device according to claim 4 or 5,

the rotating electric machine main body has three-phase windings as the multiple-phase windings of each group,

the winding connection switching mechanism of each group is a switching mechanism that switches the interconnection of the three-phase windings of the corresponding group between a Y connection that is the 1 st winding connection state and a Δ connection that is the 2 nd winding connection state.

7. The rotating electric device according to any one of claims 1 to 6,

the driving force of the rotating electric machine body is used as a driving force source of a steering device of a vehicle.

8. The rotating electric device according to any one of claims 1 to 7,

the 1 st power connection terminal, the 2 nd power connection terminal, the power switching mechanism, the rotating electric machine main body, the winding connection switching mechanism, the inverter, and the control device are integrally formed.

Technical Field

The present invention relates to a rotating electric machine device using two dc power supplies having different voltages.

Background

As the rotating electric device described above, for example, a technique described in patent document 1 is known. In the technique of patent document 1, two sets of three-phase windings are provided in one stator, and two sets of inverters are provided for the respective three-phase windings. That is, the 1 st stator winding 14, the 1 st inverter INV1 for the 1 st stator winding 14, the 2 nd stator winding 16, and the 2 nd inverter INV2 for the 2 nd stator winding 16 are provided. The dc power of the 2 nd battery 22 of high voltage is supplied to the 2 nd inverter INV 2. The switches are switched so that the dc power of the 1 st battery 20 at a low voltage is supplied to the 1 st inverter INV1 at a low rotation speed and the dc power of the 2 nd battery 22 at a high voltage is supplied at a high rotation speed. The 1 st and 2 nd stator windings 14 and 16 are fixed to the Y-connection.

Disclosure of Invention

Technical problem to be solved by the invention

However, in the technique of patent document 1, when the 2 nd battery 22 having a high voltage fails, the dc power cannot be supplied to the 2 nd inverter INV2 and the 2 nd stator winding 16, and therefore the output of the rotating electric machine decreases. When the high-voltage 2 nd battery 22 has failed, if the switch is switched so as to supply the high-voltage 2 nd battery 22 dc power to the 1 st inverter INV1 at a high rotation speed, the dc power is not supplied to the 1 st inverter INV1 and the 1 st stator winding 14, and the output of the rotating electric machine becomes zero.

On the other hand, when the 1 st battery 20 having a low voltage has failed, if the switch is switched so that the 1 st inverter INV1 is supplied with the dc power of the 1 st battery 20 at a low rotation speed, the dc power is not supplied to the 1 st inverter INV1 and the 1 st stator winding 14, and the output of the rotating electric machine decreases. Therefore, the technique of patent document 1 has a problem that, when one dc power supply fails, the output of the rotating electric machine decreases.

In the technique of patent document 1, the 1 st stator winding 14 is fixed to the Y-connection, and therefore the induced voltage constant of the 1 st stator winding 14 is a fixed value. Therefore, the technique of patent document 1 is configured to supply the dc power of the 1 st battery 20 at a low rotation speed at which the induced voltage generated in the 1 st stator winding 14 becomes low in accordance with the low rotation speed, and to supply the dc power of the 2 nd battery 22 at a high rotation speed at which the induced voltage generated in the 1 st stator winding 14 becomes high in accordance with the high rotation speed. However, as described above, when the 1 st or 2 nd battery fails, the power supply voltage cannot be changed in accordance with the induced voltage that changes according to the rotation speed, and there is a problem that the performance of the rotating electric machine is degraded.

Therefore, it is desirable to obtain a rotating electric machine device that can output torque to a rotating electric machine even if one dc power supply fails, and can appropriately change the characteristics of the rotating electric machine in accordance with a change in the dc power supply voltage.

Technical scheme for solving technical problem

The rotating electric device according to the present application includes: a 1 st power connection terminal, the 1 st power connection terminal being connected to a 1 st DC power supply;

a 2 nd power connection terminal connected to a 2 nd DC power supply having a voltage lower than that of the 1 st DC power supply;

a power supply switching mechanism that switches and outputs the dc power supplied to the 1 st power supply connection terminal and the dc power supplied to the 2 nd power supply connection terminal;

a rotating electric machine main body having a multi-phase winding;

a winding connection switching mechanism that switches the connection of the multiphase windings to each other between a 1 st winding connection state and a 2 nd winding connection state in which an induced voltage constant with the winding becomes lower than the 1 st winding connection state;

an inverter including a switching element that converts dc power output from the power switching mechanism and ac power supplied to the multiphase winding; and

and a control device that switches and drives the power supply switching mechanism, switches and drives the winding connection switching mechanism according to a switching state of the power supply switching mechanism, and controls the rotating electric machine main body by driving the switching elements to be turned on and off based on the switching state of the power supply switching mechanism and the switching state of the winding connection switching mechanism.

Effects of the invention

According to the rotating electric device of the present application, the power supply switching mechanism can switch between a state of outputting the dc power of the 1 st dc power supply of high voltage and a state of outputting the dc power of the 2 nd dc power supply of low voltage, and therefore, for example, when one dc power supply is abnormal, the rotating electric device can be operated using the other dc power supply. Further, the winding connection switching mechanism is switched to the 1 st winding connection state in which the induced voltage constant of the winding is high or the 2 nd winding connection state in which the induced voltage constant of the winding is low, in accordance with the switching state of the power supply switching mechanism, and therefore, the induced voltage constant of the winding can be appropriately changed in accordance with the change of the dc voltage. Further, the rotating electric machine main body can be controlled by appropriately performing on/off control of the switching elements of the inverter based on the change in the dc voltage and the change in the induced voltage constant of the winding. Therefore, even if one dc power supply fails, the rotating electric machine can be made to output torque, and the characteristics of the rotating electric machine can be appropriately changed in accordance with the change in the dc power supply voltage.

Drawings

Fig. 1 is a circuit diagram of a rotating electric device according to embodiment 1.

Fig. 2 is a diagram showing Y-connections of the three-phase winding according to embodiment 1.

Fig. 3 is a diagram showing Δ connections of the three-phase winding according to embodiment 1.

Fig. 4 is a circuit diagram of the winding connection switching mechanism according to embodiment 1.

Fig. 5 is a schematic configuration diagram of the electric power steering apparatus according to embodiment 1.

Fig. 6 is a side view of the rotating electric device integrally configured according to embodiment 1.

Fig. 7 is a side view of the rotating electric device integrally configured according to embodiment 1.

Fig. 8 is a circuit diagram of a rotating electric device according to embodiment 2.

Fig. 9 is a schematic configuration diagram of the electric power steering apparatus according to embodiment 2.

Fig. 10 is a side view of a rotating electric device integrally configured according to embodiment 1.

Fig. 11 is a side view of a rotating electric device integrally configured according to embodiment 1.

Detailed Description