JPH0556504A - Electric vehicle - Google Patents

Abstract

PURPOSE:To minimize the power consumption of a battery by interrupting power supply to a controller regardless of ON/OFF state of power switch when an acceleration signal detecting circuit detects no acceleration signal successively for a predetermined time. CONSTITUTION:When a motor tricycle 1 is left as it is for a long with its power switch 12 being turned ON, a signal is delivered to a microcomputor 14 if an acceleration signal detecting circuit 15 receives no signal at all from an accelerator 7 for 20min. The microcomputor 14 delivers a Low level signal to an auto-OFF circuit 19 and since no current flow into the base of transistor in a switching circuit 20, the transistor is turned OFF to interrupt current flow through the coil in a relay switch circuit 21 thus turning the switch OFF. Consequently, current loss can be minimized and the battery is protected against dying.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vehicle that runs on a battery as a drive source.

[0002]

2. Description of the Related Art Conventionally, in this type of electric vehicle, when a power switch is turned on before traveling, a current flows through a control device for controlling a motor and a display panel for displaying speed and the like. Then, by operating the accelerator, the energization of the motor is controlled, the rotation speed is varied, and the drive wheels are driven to travel.

Next, when the traveling of the electric vehicle is stopped, the power switch is usually turned off to leave the electric vehicle.

However, at this time, if the electric vehicle is separated from the electric vehicle without turning off the electric power switch, for example, if the user forgets to turn off the electric power switch due to an emergency, the power to the motor is cut off by the accelerator. However, the control device such as the microcomputer and the display panel are in a state in which a current is flowing, and the voltage of the battery drops after a long time,
There was a problem that the motor did not rotate when trying to restart.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention can minimize the battery consumption even when the vehicle is away from the electric vehicle for a long time while the power switch is turned on. An object is to provide an electric vehicle that can restart.

[0006]

According to the present invention, there is provided a battery for operating a control device for a motor, driving wheels driven by the motor, an accelerator for generating an accelerator signal for controlling a rotation speed of the motor, and An accelerator signal detection circuit for detecting the accelerator signal and an accelerator signal detection circuit for detecting that the accelerator signal is not output continuously for a predetermined time in a power supply switch for turning on and off the power supply to the control device. When it is detected, the power supply to the control device is turned off regardless of the ON state of the power switch.

Further, in a motor equipped with a battery for operating a motor control device, drive wheels driven by the motor, and a power switch for turning on / off the power supply to the control device, the rotation of the motor is controlled. A motor rotation detection circuit for detecting, and when the motor rotation detection circuit continuously detects zero rotation speed of the motor for a predetermined time, the power supply to the control device is cut off regardless of the ON state of the power switch. It is characterized by

Further, a battery for operating the motor control device, drive wheels driven by the motor, an electromagnetic brake that is turned on when the motor is de-energized, and the control device energized. In the one provided with a power switch for turning off, an electromagnetic brake detection circuit for detecting an on state of the electromagnetic brake, and the power switch of the power switch when the electromagnetic brake detection circuit continuously detects the on state for a predetermined time. It is characterized in that the power supply to the control device is turned off regardless of the ON state.

A battery for operating the control device of the motor, drive wheels driven by the motor, and a power switch for turning on and off the power supply to the control device are provided, and the user rides on the vehicle. In this case, a human body sensor for detecting the getting-off state of the user is provided, and when the human body sensor continuously detects getting off of the user for a predetermined time, the controller is energized regardless of the ON state of the power switch. It is characterized by being cut.

[0010]

[Operation] When the electric vehicle is driven and the power switch is forgotten and a long time has passed, when the accelerator signal detection circuit does not continuously detect the accelerator signal for a predetermined time, the control device is turned off. ..

Further, when the motor rotation detection circuit for detecting the rotation speed of the motor detects that the rotation speed of the motor is zero continuously for a predetermined time, it operates so as to turn off the power supply to the control device.

Further, an electromagnetic brake is attached to the motor,
When the electromagnetic brake detection circuit continuously detects the on state of the electromagnetic brake applied for a predetermined time, the control device is operated to be turned off.

For a vehicle that the user gets in and runs, when the human body sensor continuously detects the user getting off the vehicle for a predetermined period of time, the control device is turned off.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIG.
It will be described in detail based on FIG.

Reference numeral 1 is a main body of an electric tricycle, 2 is a left and right wheel that is moved by a handle 3, and a front wheel that determines a traveling direction, 4 is a drive wheel, which is driven by a motor 17 to be rotated by a motor 5 as a power source. Further, reference numeral 6 denotes a seat seat on which a driver can sit, and a normal driver sits on the seat seat 6 and holds the steering wheel 3 to push down an accelerator 7 inside the steering wheel from above to move the electric tricycle body 1 forward. To do. Further, by pushing up the accelerator 7 from below, the electric tricycle main body 1 moves backward.

Reference numeral 8 is a display panel provided on the handle 3 portion of the electric tricycle body 1. The display panel 8 has a horn switch 9 for notifying a warning, and a battery checker for indicating the remaining amount of the battery 5 by an LED. 10, low speed,
It is provided with a speed change switch 11 for switching the speed in three stages of medium speed and high speed, and a power switch 12 for turning on / off the power of a control device described later.

Next, the control device for the electric tricycle will be described with reference to FIG.

The battery 5 serves as a drive source for the electric tricycle body 1, drives the drive wheels 4 and displays on the display panel 8,
The constant voltage circuit 13 supplies power to a microcomputer, which will be described later.

Reference numeral 14 denotes a microcomputer which is the center of control of the electric tricycle main body 1. The microcomputer 14 has an accelerator signal detection circuit 15 for detecting that the accelerator 7 is pressed, and an electric signal indicating the operation amount of the accelerator 7. It is input from the accelerator circuit 16 which is converted into and captured. Further, the microcomputer 14 is input to the drive circuit 18 for transmitting the accelerator signal from the accelerator circuit 16 to the motor 17. When the accelerator signal detection circuit 15 does not detect the output of the accelerator signal continuously for 20 minutes, the power supply auto-off circuit 19 to be described later.
Is sent to.

Reference numeral 19 is the power supply auto-off circuit, and 20 is a switching circuit for receiving and outputting the signal output from the power supply auto-off circuit 19 and turning on / off the relay switch circuit 21. The switching circuit 20 is composed of a combination of an integrating circuit and a transistor.

The operation of the electric tricycle body 1 will be described together with the circuit.

On the electric tricycle body 1, power switch 12
Put in. At this time, the current from the battery 5 momentarily flows through the integrating circuit in the switching circuit 20. When this current flows through the base of the transistor, a current flows through the coil of the relay switch circuit 21 and the relay switch circuit 21 is switched on. Then, the voltage is reduced from 24V to 5V through the constant voltage circuit and a current flows, and the microcomputer 14 is driven. Subsequently, a high-level signal is output from the microcomputer 14 to the power auto-off circuit 19, and the current can flow to the base of the switching circuit 20 to continuously turn on the transistor. It becomes possible to control the electric three-wheeled vehicle main body 1 while maintaining the state in which is entered.

When moving forward or backward, the rotation direction of the motor 17 is changed by pushing up or pushing down the accelerator 7. Motor 17 at this time
In driving, current flows from the battery 5 to the motor 17 via the switch in the relay switch circuit 21 that maintains the ON state. By inputting the accelerator signal from the accelerator 7 input to the microcomputer 14 to the drive circuit 18, the motor 17 can be rotated at a rotation speed according to the accelerator 7.
That is, it is possible to travel at a traveling speed according to the operation amount of the accelerator 7.

Next, for example, when the power switch 12 is forgotten to be turned off and the electric tricycle body 1 is left for a long time, the accelerator signal detection circuit 15 confirms that there is no signal from the accelerator 7.
When it continues for 0 minutes, it sends a signal to the microcomputer 14. In response to this, the microcomputer 14 turns off the power supply
A low-level signal is sent to 19, and no current flows in the base of the transistor in the switching circuit 20, so the transistor is turned off and no current flows in the coil in the relay switch circuit 21, and the switch is turned off.

As described above, when the accelerator 7 is not operated and the accelerator detection circuit 15 does not detect the accelerator signal for 20 minutes or longer, the switch in the relay switch circuit 21 is automatically turned off, so that the current loss is minimized. The battery can be prevented from running out.

Although the accelerator signal detection circuit 15 for detecting the accelerator signal is used in this embodiment, a motor rotation detection circuit for detecting the rotation speed of the motor 17 is provided in addition to the accelerator signal detection circuit 15 so that the rotation speed of the motor 17 is 20 hours that are zero
When it continues for more than a minute, the control circuit may be automatically turned off.

Further, focusing on the fact that the electromagnetic brake is always applied while the motor 17 is stopped, an electromagnetic brake detection circuit for detecting the electromagnetic brake applied state is used instead of the accelerator signal detection circuit. A low level signal may be sent from the power supply auto-off circuit 19 when it is provided and it is detected that the electromagnetic brake is continuously applied for a predetermined time.

Further, a means for detecting that a user is riding on the seat 6 is provided, for example, an infrared sensor is provided near the handle, a pressure sensor is provided on the seat 6, and the handle 3 is touched. A sensor may be provided.

In addition to the above, by combining the accelerator signal detection circuit 15 and the motor rotation detection circuit, it is possible to prevent a low level signal from being sent from the power supply auto-off circuit 19 unless both detection circuits operate. It is possible to provide a more convenient electric tricycle than the one described above.

[0030]

As described above, the present invention has an effect that the battery consumption can be minimized and the battery can be prevented from running out even when the power switch is turned on and the vehicle is left for a long time. ..

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an embodiment of the present invention.

FIG. 2 is a perspective view of a main body of the electric vehicle.

FIG. 3 is a perspective view of a display panel of the electric vehicle.

[Explanation of symbols]

 17 Motor 5 Battery 4 Drive wheel 7 Accelerator 12 Power switch 15 Accelerator signal detection circuit

Claims (4)

[Claims] 1. A battery for operating a motor control device, a drive wheel driven by the motor, an accelerator for generating an accelerator signal for controlling a rotation speed of the motor, and energization of the control device. In a power switch for, to the accelerator signal detection circuit for detecting the accelerator signal, and the accelerator signal detection circuit when the accelerator signal detection circuit detects that the accelerator signal is not output continuously for a predetermined time. An electric vehicle characterized in that energization to the control device is cut off regardless of the ON state. 2. A motor equipped with a battery for operating a motor control device, drive wheels driven by the motor, and a power switch for turning on and off the power supply to the control device. A motor rotation detection circuit for detecting, and when the motor rotation detection circuit continuously detects zero rotation speed of the motor for a predetermined time, the power supply to the control device is cut off regardless of the ON state of the power switch. An electric car that is characterized. 3. A battery for operating a motor control device, drive wheels driven by the motor, and an electromagnetic brake which is turned on when the motor is de-energized.
In a device provided with a power switch for turning on and off the power supply to the control device, an electromagnetic brake detection circuit for detecting an on state of the electromagnetic brake, and the electromagnetic brake detection circuit continuously turns the on state for a predetermined time. An electric vehicle characterized in that the electric power to the control device is cut off regardless of the ON state of the power switch when detected. 4. A battery for operating a motor control device, drive wheels driven by the motor, and a power switch for turning on and off the power supply to the control device are provided, and a user rides in the vehicle. In this case, a human body sensor for detecting the getting-off state of the user is provided, and when the human body sensor continuously detects getting off of the user for a predetermined time, the controller is energized regardless of the ON state of the power switch. An electric car characterized by being cut.