JPS6062885A - Power source for motor - Google Patents

Abstract

PURPOSE:To reduce the size of a solar battery by controlling to start or stop a motor in response to the output voltage of the battery. CONSTITUTION:When the terminal voltage Vs of a solar battery 1 does not reach a starting level Vh of the motor 4, a stop command signal is outputted, the switching side 2a of a relay contact 1 is switched to a terminal 2c, and a quasi-load 5 is connected to the battery 1. When the terminal voltage Vs of the battery 1 reaches the starting level Vh, a starting command signal is outputted, the switching piece 2a of the contact 2 is switched to the terminal 2b, the inverter 3 is driven to initiate the starting of a motor 4. When the terminal voltage Vs becomes the stopping level Vl or lower for the prescribed time or longer at the motor operating time, a stop control signal is outputted, the inverter 3 is isolated from the battery 1, and stopped.

Description

[Detailed Description of the Invention] The present invention relates to a seven-wheel power supply device that drives a motor using the output of a solar cell, and an object thereof is to reduce the size and cost of the solar cell and to stably start the motor. The ratio is 1:1.

Generally, when driving a seven-wheel drive using the output of a solar cell,
6iJ When starting the motor, a starting current several times the steady current is required, so the solar cell is used to start the motor.
It is necessary to have a capacity that allows the current to flow.
The disadvantage is that the device is large and expensive.

This invention was made based on the points in 1jiJ, and consists of a motor driven by the output of a pond in the sun, and a current from the battery in 1) flowing through Mi. When the load is 1J, the terminal voltage of the battery increases and reaches the starting level of the 1) IJ motor, and the 4f voltage decreases and reaches the stop level of 1,000. The base lf/ which outputs standard No. 13 with different levels when
1) a detection unit that detects the terminal voltage and outputs a detection signal proportional to the terminal voltage; 1) iS;
A time constant circuit that delays the falling time of the detection signal, and a command that outputs a start command signal and a stop command signal when the pre-elimination detection signal exceeds the reference signal 1) iJ and when it is dry, respectively. and a switching section that switches and connects the MiJ Mi3 battery to the motor according to both of the command signals.

Therefore, according to the motor power supply device of the present invention, by providing a simulated load, a base width signal generation section, a time constant circuit of the detection section 2, a command section, and a switching section, the solar cell can be used to generate a current that is about the same as the steady current of the motor. This allows the solar cell to be made smaller and less expensive, and even if the terminal voltage of the solar cell drops after the motor has started, the motor will not stop and remain stable. and start it.

Next, the present invention will be described in detail with reference to drawings showing one embodiment thereof.

In Figure 1, (1) is a solar cell, (2) is a switching piece (
2a) is a relay contact of a relay (to be described later) which is a switching unit connected to the output terminal of the battery (1), and (3) is a relay contact of a relay whose input terminal is connected to the first switching terminal (2b) of the relay contact (2) and which is connected to the battery (1).
The inverter (4) is connected to the output terminal of the inverter (3) and the impark (3) is connected to the output terminal of the inverter (3).
) an AC output driven by an AC output from (5)
is a simulated load consisting of a resistor whose one end is connected to the second switching terminal (2) and whose other end is grounded, and (6) is a simulated load consisting of a resistor whose power supply terminal and control terminal are respectively fi! and l switching terminal (21). morph control r1 (inverter control unit connected to the output terminal A of part 1 and controlling the output of the inverter (3); (7) has an input terminal connected to the output terminal of the battery (1); This is the motor control section.

Next, FIG. 2 showing the configuration of the Tanabata control section (7) will be explained.

In the figure, (8) is the input terminal of the motor control unit (7), (9) is the first backup diode whose anode is connected to the input terminal (8), and (10 is the diode (9) whose one end is connected to the input terminal (8). ) and the other end is grounded.
Capacitor, (]υ is the first resistor whose one end is connected to the cathode of the diode (9), αgon is the second resistor whose one end is connected to the other end of the resistor 0υ and the other end is grounded, (13 is the resistor Q
2 is a second capacitor provided in parallel with the diode (9), capacitor GO, Qe, and resistor (1υ, a
The detection unit 04) that outputs a detection signal proportional to the terminal voltage of the battery (1) is configured by the second, and the resistor (1
1) and capacitor (13), the time constant circuit Oυ is (
11Y has been completed.

Qe is a third resistor whose one end is connected to the cathode of the diode (9), 01) is a @3 diode consisting of a Zener diode whose one end is connected to the other end of the resistor (10) and the other end is grounded; 0 barrel has one end connected to the resistance 0 → the other end is the fourth resistor D'C10, one end is connected to the other end of the resistor α8), and (1) the anode is connected to the other end of the resistance 0. A third diode connected to the terminal and having a cathode connected to the output terminal of a comparator to be described later, a resistor OQ~(1) and a diode (E) constitute a wiping signal generating section c!11.

@ is a comparator whose one input terminal (-) is connected to the other end of the resistor (l◇) and the other input terminal (10 is the resistor Q8) is a comparator, (231 is a command unit with both ends connected to diode(
The sixth resistor, which is the load resistance of the comparator @, connected to the cathode of 9) and the output terminal of the comparator wire,
1 is connected to the output terminal of t221 with one end of each resistor 7 + x < s, (
), the collector is the control terminal of the inverter control section (6) □
The first transinutor of NPNq is connected to The NPN type second transistor, ■9), has both ends connected to the input terminal (8) and the transistor 0.
A fourth diode for absorbing reverse voltage is connected to the collector of 8) and constitutes the relay (301) together with the relay contact (2). , A motor control section (7) is constituted by a quadruple circuit indicated by a chain line in FIG.

In addition,! 321 is an input terminal of impark (3).

Next, the operation of the above embodiment will be explained.

Now, when the terminal voltage VS of the battery (1), as shown by the solid line in Figure 3, has not reached the starting level I of the motor (4) and VI+, as shown by the one-dot chain line in the same figure, , resistance 0
The reference signal Vr, which is based on the Zener voltage of the diode α power through As in, from the detector α→ to the comparator @
The detection signal VLJ at the input terminal (-)- is the reference signal Vr.
Since the ratio is below , a high-level stop command is output from the ratio 'IV'ag (22), and both 1-Ranshinuta [261, (28) Kado'& are turned on, and the first tofunshinoku■6) By turning on the inverter control section (6)
At the same time, the second transinutor (28) is turned on, and the relay coil 291 is turned on and energized, and the switching piece (2 coils) of the relay contact (2)
The switching terminal (switched to 2) disconnects the inverter (3) from the battery (1) and at the same time connects the simulated load (5) to the battery (1). Note that the output current of the battery (1) I
s changes as shown by the broken line in the figure.

Then, the power of the battery (1) increases and the terminal voltage Vs
When reaches the activation level Vb of the motor (4) at time L1, the input terminal (
+) is inverted to low level as shown by the dashed line in FIG. (−
Since the detection signal V(I to
28+ are both turned off, and the first transistor (2G) is turned off.
When the belief υ is output, MoK,! <2 transinuta (28
), the relay coil (29) is de-energized, the switching piece (2I) of the relay contact (2) is switched to the first switching end (21), and the simulated load (5) is connected to the battery. (1)
91, the inverter control section (6) is connected to the battery (1).
The inverter (3) is driven and the output is restricted to 1, and the output of the innovator (3) is changed to the remoter (
4) is started.

Next, in order to supply starting current to the motor (4), m
As shown by the broken line in Figure 3, the output flow Is of the 'I'li pond (1) is after the start of the motor (4), that is, I
I, 5 continues to increase even after 1.I, and due to the increase in output current 1h, the terminal 1-voltage v8 decreases as shown by the solid line in the same figure. For example, at time L2, the terminal voltage Vs increases when the motor (4
), the detection signal Vt+ also begins to decrease from time 1.1 in proportion to the terminal voltage Vs, as shown by the dotted line in the same figure, but the detection signal Vd+ starts decreasing due to the time constant circuit OQ. Because the fall time of Vs is delayed, the terminal voltage Vs
Even if the motor (4) reaches the stop level V# by time L2, the detection signal Vd does not fall below the reference signal Vr and the motor (4) is started, as shown by the dotted line and the one-dot chain line in the figure.

At this time, as shown by the broken line in FIG.
is the point at which the motor (4) is completely started, that is, the time (
2 shows a slightly larger peak than the output current level of the battery (1) during steady operation of the motor (4).
As the motor starts and transitions to a steady operating state, the motor (4
) decreases and the output current Is gradually decreases, and as the output current Is decreases, the terminal voltage Vs increases as shown by the solid line in the figure, and the motor (4) returns to a steady operating state. Then, as shown by the solid line and the broken nine-dot line in the figure, the terminal '16 voltage Vs.

The output J current Is and the detection signal Vd become constant.

Next, when the terminal voltage Vs of the battery (1) decreases and reaches the stop level V/ at time 3, as shown by the solid line in FIG.
佼sy; The base l(1[curvature-V1) to (the input terminal C0 of 221) is inverted to a high level as shown by the dashed line in the same figure, and the time constant circuit θυ As shown by the dotted line in IZ1, the detection signal/VLI that decreases due to the delay time falls below the reference signal v1 at time L3,
The output of the comparator @ is inverted from low level to high level by 11J, and both transistors 1 and (28+
both turn on, turning on the g51 + - range nut, outputting the stop control image to the inverter control section (6), and turning on the second transinutor (support).
When the relay coil (29) is repeatedly energized and excited, the switching piece C2 of the relay contact (2) switches to the second switching terminal (2), and when the inverter (3) is disconnected from the battery (1), the same plane , the simulated load (5) is connected to the battery (1),
Motor (4) is stopped.

Therefore, according to the embodiment described in 1Jii, the quasi-signal generating section (21) outputs the ratio 1 articulator (the two input terminals (-
The level of the reference signal to one the terminal voltage v8 of the motor (4) increases.

The activation level decreases to V11. Stop J-level) Switch when each reaches IB, and then switch IIδ constant circuit 0.
0 to delay the 3'vdO fall time in the detection section, the battery (1) is
It is not necessary to use a battery with a large capacity that can supply a starting current of In addition, even if the terminal voltage Vs of the Tf battery (1) decreases after starting the motor (4), the motor (4) can be stably started without stopping. .

[Brief explanation of the drawing]

The drawings show one embodiment of the motor power supply device of the present invention,
FIG. 1 is a block diagram, FIG. 2 is a wiring diagram of the motor control section shown in FIG. 1, and FIG. 3 is a waveform diagram of voltages, currents, etc. at various parts. (1)...Solar cell, (2)...Relay 1 and point, (
4)... Tanabata, (5)... Simulated load, 04)...
・Detection section, α9...11. y constant circuit, agony)...Reference signal generation section, 0 feathers...Ratio I bite tj number. Agent: Patent Attorney Ryuta Fujita $3 Figure 4M-10

Claims (1)

[Claims] ■ A motor driven by the output of a solar cell, a simulated load through which current from the battery flows, and when the terminal voltage of the battery increases and reaches the starting level of the motor, and +: +iJ terminal voltage. a reference signal generating section that outputs a reference signal of a different level when the motor decreases and reaches a stop level of the motor; a detecting section that detects the terminal voltage and outputs a detection signal proportional to the terminal voltage; a 114 constant circuit that delays the fall time of the detection signal; and a command unit that outputs a start command signal and a stop command signal when the detection signal exceeds and falls below the reference number fi in riij, respectively. , 1jiJ, and a switching unit that switches and connects the battery to the motor in response to command signals.