JPS62230400A - Controlling device for commutatorless motor-generator - Google Patents

Abstract

PURPOSE:To prevent the burning of a resistor for start by forming a predetermined quiescent time on restart after the failure of start. CONSTITUTION:When output voltage from a motor-generator 10 does not reach fixed voltage before the start set time of a timer 18 for start passes, a start failure detection relay 22 is operated by an operation output from a start failure detection timer 21. When a set command is inputted to a rest relay 16 in case of the state, a contact, l6b is opened, and the self-hold of the start failure detection relay, 22 is released while a contact l6a is closed, thus working a program timer 23. When the first set time passes, a contact 23b is opened, and an input circuit for the reset relay 16 is interrupted. when an exciting coil 20 is excited until the second set time passes and a resistor 6 for start is not short circuited, the contact 236 is closed, and an input circuit for a reset command to the reset relay 16 is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a control device for a commutatorless electric generator for a vehicle.

(Prior Art) The main circuit of this type of commutatorless electric generator for a vehicle (hereinafter simply referred to as a motor generator) has a configuration as shown in FIG. That is, as shown in FIG.
1 to pantograph 2. A power supply voltage is obtained through the circuit breaker 3, and this power supply voltage is applied to the filter reactor 4. TFLH for short circuit of starting resistor! Starting resistor 6 with contactor 5 connected in parallel. Series resistor7. The configuration is such that the power is supplied to the motor generator 10 through a reactor (MSL) 8 and a thyristor bridge circuit 9. In addition, a low voltage relay 11 is provided in the main circuit via a series resistor 12 to detect that the input voltage from the chestnut 111 is higher than a certain voltage. Breaker 3
It is intended to invest.

Note that 13 is a grounding switch that grounds the grounding line of the main circuit. In addition, 14 is the output T of the non-commutator electric generator 10.
This is a voltage detector that detects the output voltage of one machine.

By the way, in order to start a motor generator with such a main circuit configuration, the starting resistor short-circuiting electromagnetic contactor 5 is released and the starting resistor 6 is inserted into the main circuit, and then the breaker is connected by the low voltage relay 11. It is started by inserting 3. In this case, the starting resistor 6 is used to reduce the large starting current that flows at the initial stage of startup, and therefore, if the capacity of the starting resistor 6 is determined by this large current, an extremely large capacity is required. . However, in general, a small-capacity starting resistor 6 is used, and size reduction is achieved by limiting the starting time of the motor generator.

Conventionally, a control device configured as shown in FIG. 7 has been used to control the fflvJ generator while limiting the startup time. In FIG. 7, 17 is an excitation coil of the circuit breaker 3, and this excitation coil 17 is connected to a control power source via a normally open contact 11a of a low voltage relay 11 and a normally closed contact 22b of a starting failure detection relay 22 (described later) in series. Bus line P
, N. Reference numeral 18 denotes a starting timer that starts counting when the breaker 3 is turned on and operates when the set starting time has elapsed. and is connected to one control power supply bus MP, and the other end is connected to the other control power supply bus N via a starting relay 19 that is excited by its operation output. 20 is an excitation coil of an electromagnetic contactor for shorting the starting resistor, and this excitation coil 20
are the normally open contact 19a of the starting relay 19 and the voltage detector 14.
The control WaS line P is connected in series through the normally open contact 14a of the .

Connected to N. Further, 21 starts counting when the circuit breaker 3 is turned on, and if the starting resistor 6 is not short-circuited by the starting resistor short-circuiting electromagnetic contactor 5 even after the starting setting time elapses, it will operate to prevent starting failure. One end of this startup failure detection timer 21 is a normally closed contact 20b that opens when the excitation coil 20 is excited.
and a normally open contact 17 that closes when the excitation coil 17 is excited.
A2 is connected in series to one control power supply bus IMP, and the other end is connected to the other control 611m source bus N via a startup failure detection relay 22 that is excited by its operation output. In addition, the startup failure detection relay 22 has its normally open contact 22
A is connected to one control power supply bus P to form a self-holding circuit. On the other hand, 16 is a reset relay that operates when a reset command is input through the reset command line 15. When this reset relay 16 operates, the normally closed contact 1 provided in the self-holding circuit of the startup failure detection relay 22 is activated.
6a is opened to release the self-holding state of the startup failure detection relay 22.

Therefore, in the control is of a motor generator having such a configuration, when the starting resistor 6 is inserted into the main circuit, the normally open contact 11a is closed by the operation of the low voltage relay 11, and the excitation coil is closed. 17 is excited, the circuit breaker 3 is turned on, and the starting timer 18 and the starting failure detection timer 21 start counting. At this time, electric generator 1i
110 is activated by turning on the PII device 3, and the output voltage on the generator side is detected by the voltage detector 14. Now, electric power generation 1 within the start time set on the start timer 18! When the output voltage on the generator side at t110 reaches a predetermined voltage, the normally open contact 1 is opened by the operation of the voltage detector 14.
4a is closed and when the starting time reaches the starting time set for the starting timer 18, the starting relay 19 is activated by the operation output of the starting timer 18, and its normally open contact 19 is activated.
The excitation coil 20 is excited by the closed circuit a. As a result, the starting resistor short-circuiting electromagnetic contactor 5 is turned on, so that the starting resistor 6 is short-circuited, and the starting of the motor generator 10 is completed.

By the way, during such startup, even if the startup timer 18 has passed the startup timer 18, the voltage detector 14
If it does not operate, the starting resistance electromagnetic contactor 5 will not be turned on, and the starting failure detection timer 21 will operate. When this startup failure detection timer 21 operates, the startup failure detection relay 22 operates based on its output, and its normally closed contact 22a
The state is self-maintained by the closed circuit. Therefore, when the normally closed contact 22b is opened due to the operation of the startup failure detection relay 22, the excitation coil 17 is deenergized, and the electric R electric machine 10 is stopped by releasing the circuit breaker 3. Thereafter, when the reset relay 16 is activated by the reset command inputted from the command line 15, the self-holding circuit is released and reset by the opening of the normally closed contact 16b, and the start failure detection relay 22 is reset again in the same sequence as described above. will be activated.

In this way, conventionally, when the electric valve mtiio is started, the starting time is set by the starting timer 18, and if the output voltage of the electric generator II 10 does not reach a predetermined voltage within the set starting time, starting failure is detected. The timer 21 and the startup failure detection relay 22 detect a startup failure and stop the electric power generator l1110, and then the startup failure detection relay 22
As a control sequence for resetting and restarting, the capacity of the starting resistor 6 was determined by a short-time rating. In this case, the number of times the startup failure detection relay 22 is reset is generally limited. Therefore, depending on how the number of resets is limited, the starting resistor with a short-time rated capacity may be heated and burnt out.

FIG. 8 shows a temperature rise curve of a starting resistor in a conventional control sequence. As can be seen from this figure, if the frequency of resetting the startup failure detection relay 22 is increased, or if the pause time (tl) from when the electric valve 1i110 is stopped until it is restarted is short, the temperature of the startup resistor increases. The rise becomes larger.

[Problems to be Solved by the Invention] As described above, the starting control of conventional electric power generators uses a small starting resistor inserted into the main circuit and has a short-time rating. , depending on the handling of the limit on the number of resets after startup failure detection.

For example, if the reset is repeated many times without a rest period, there is a problem in that the starting resistor is heated and burnt out.

Therefore, the present invention has developed a starting resistor that is inserted into the main circuit when starting up the electric valve N machine.The starting resistor is kept at its rated capacity for a short period of time, and no matter how many times the starting resistor is restarted after a starting failure, the starting resistor is heated and burnt out. It is an object of the present invention to provide a control device for a non-commutated motor/generator, which can start and control the motor/generator without causing the commutator to start.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention forms a current-carrying path for the main circuit on the condition that the input voltage on the power supply side is a certain voltage or higher, and A starting means for starting the non-commutator motor generator through a starting resistor inserted in the main circuit, and an output voltage of the motor generator when a scheduled starting time elapses after the non-commutator motor generator is started. A starting vfr that disconnects the starting resistor from the main circuit on the condition that the voltage is a predetermined voltage.
WI setting means, and the condition that the starting resistor is set when the non-commutated electric valve motor is started, and that the starting resistor is not disconnected from the main circuit even after the scheduled starting time has elapsed by the starting time setting means. a starting failure detection means for detecting a starting failure of the non-commutator motor generator and causing the starting means marked # to cut off a current carrying path of the main circuit; and inputting a reset command to reset the starting failure detection means. a reset means for restarting the starting means; and a reset means that operates when a first set time has elapsed after a reset command is issued by the reset means to shut off the input circuit for the reset command, and further includes a reset means for restarting the reset command; and a pause time setting means that returns to release the shutoff of the reset command input circuit when the second set time has elapsed.

(Function) Therefore, in the control device for an electric valve electric motor having such a configuration, a startup failure is detected by the startup failure detection means,
When a first set time has elapsed after the reset command is input to the startup failure detection means, the reset command input circuit is cut off, and when a second set time has elapsed, the cutoff of the reset command input circuit is released. Once a reset command is input to the startup failure detection means and the electric power generator Rtl is restarted, a certain amount of rest time is always required. Therefore, the starting resistor is cooled down during this pause time, and no reset command is input during that time.
The temperature of the starting resistor will be balanced at a certain point, making it possible to suppress the temperature rise.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an electric J! ! ffi machine i! ilJ
This shows an example of the configuration of the sequence circuit of the wJ device.
Parts that are the same as those in the figure are given the same symbols and their explanations are omitted.
Only the differences will be described here. In this embodiment, as shown in FIG. 1, the normally open contact 16a of the reset relay 16
The program timer 23 for reset detection, which is reset when is closed, and the normally closed contact 20b, which opens when the excitation coil 20 of the electromagnetic contactor 5 for shorting the starting resistor, which shorts the starting resistor 6, is excited, are connected in series. Bus lines P, N
and the program timer 23 for reset detection.
The normally closed contact 23b, which opens when
This configuration is provided in the input circuit of the reset relay 16 to which a reset command is input from 5.

This program timer 23 for reset detection is activated by the operation of the reset relay 16 as shown in FIG.
When 6a closes, it is reset and starts counting, and the first
When a second set time has elapsed, the timer operates to open the normally open contact 23b provided in the reset command input circuit, and when the second set time has elapsed, the timer returns and closes the normally closed contact 23b. It is.

Next, the operation of the control device for the electric power generator 'Rn constructed as described above will be described.

With the starting resistor 6 inserted in the main circuit,
10 is started, and before the start time set by the start timer 18 has elapsed, the voltage detector 14 detects that the output voltage of the electric generator 1110 reaches a predetermined voltage, and the start resistor 6 is shorted by the N magnetic contactor 5 for shorting the start resistor. Since the operation from the time the startup is completed until the startup is completed is the same as that of the conventional method, the explanation thereof will be omitted here. If the output voltage of the electric generator 10 does not reach the predetermined voltage before the startup time set by the startup timer 18 has elapsed, the startup failure detection relay 22 is operated by the operation output of the startup failure detection timer 21, and its self-maintenance is maintained. A self-holding circuit is formed by the contact 22a. In such a state, the reset command Pi! When a reset command is input from 15 to the reset relay 16, the normally closed contact 16b of the reset relay 16 opens to release the self-holding of the startup failure detection relay 22, and at the same time, the normally open contact 16a of the reset relay 16 closes. The reset detection program timer 23 is reset and starts counting.

The program timer 23 operates when a first set time has elapsed after starting counting, and opens its normally closed contact 23b to cut off the input circuit of the reset relay 16. The operation of the program timer 23 continues until the second set time elapses, and if the excitation coil 20 is excited during that time and the starting resistor 6 is short-circuited by the starting resistor short-circuiting electromagnetic contactor 5, it is normally closed. When the contact point 20b is opened, the program timer 23 returns to its normal state. If the excitation coil 20 is not excited within the second set time, the timer returns to normal after the second set time has passed, closes the normally closed contact 231), and sends a reset command input circuit to the reset relay 16. If a reset command is inputted, restart sequence control is performed.

In this way, the reset detection program timer 23 operates when the first set time has elapsed after being reset by the input of the reset command, and cuts off the input of the reset command to the reset relay 16, and this operation is the setting R11 of 12.
If the excitation coil 22 is not energized by the time ffi elapses, it returns to normal operation and enters the restart sequence control by inputting a reset command (7), during which the starting resistor 6 is cooled during the rest period. Therefore, no matter how many times the reset command is issued through the reset command line 15, an interlock is established in the circuit sequence, so the starting resistor 6 will not be restarted before it has cooled down, and the starting resistor 6 will not be restarted before it has cooled down. It is possible to prevent the vessel 6 from being overheated and burnt out.

FIG. 3 shows a temperature rise curve of the starting resistor 6 according to the sequence circuit of this embodiment.

As can be seen from this figure, since the program timer 23 for reset detection always takes a pause time (t2) between restarts, the starting resistor 6 is cooled down during this pause time, and during that time the reset command line 15 Since the starting resistor 6 is not reset no matter how many times a reset command is issued through the starting resistor 6, the temperature of the starting resistor 6 is balanced at a certain point, and the temperature rise can be suppressed.

In the above embodiment, when the normally closed contact 16a of the reset relay 16, which is activated by the input of a reset command, is closed, it is reset and starts counting, and when the first setting time has elapsed, the timer operates, and this operation is the second setting. We used a reset detection program timer 23 that resets the timer when the time elapses, but instead of this we use two time relays 24 and 25 as shown in Figure 4, and by combining these, we can also create the following circuit configuration. The same effects as in the above embodiment can be obtained. That is, as shown in FIG. 4, the first time relay 24 and the normally closed contact 16b2 of the reset relay 16 are connected in series to the control 0m power supply bus, N, and the second time relay 25 and the first time relay 2
The normally closed contacts 24b of the second time relay 25 are connected in series to the control power supply buses P and N, and the normally closed contacts 25b of the second time relay 25 are provided in the reset command input circuit of the reset relay 16. be.

Therefore, with such a configuration, when a reset command is input to the reset relay 16 as shown in FIG.
The first time relay 24 is turned off and its normally closed contact 2
4b is closed, and the second time relay 25 starts counting. Then, the second time relay 25 is turned on after the first set time has elapsed, and the reset command input circuit of the reset relay 16 is cut off by opening its normally closed contact 25b. The operation of this second time relay 25 is
ti continues for the set time, and at the same time the first time relay 24 turns on. As a result, the starting resistor 6 is cooled down during the second set time of the second time relay 25 as a rest time.

[Effects of the Invention] As described above, according to the present invention, a starting resistor that forms a conduction path for the main circuit and is inserted into the main circuit on the condition that the input voltage on the power supply side is equal to or higher than a certain voltage. a starting means for starting a non-commutated motor-generator through the non-commutated motor-driven valve Nll, and the condition that the output voltage of the motor-generator becomes a predetermined voltage when a scheduled starting time has elapsed after the non-commutated motor-driven valve Nll is started. a starting time setting means for disconnecting the starting resistor from the main circuit; and a starting time setting means that is set when the commutatorless motor generator is started and that the starting time setting means sets the starting time setting means to disconnect the starting resistor from the main circuit. a starting failure detection means for detecting a starting failure of the non-commutator motorized valve N11 on the condition that the resistor is not disconnected from the main circuit, and causing the starting means to cut off the energization path of the main circuit; and a reset command. a reset means which resets the startup failure detection means by inputting the following information and causes the activation means to restart the activation means; The motor-operated valve 1tlffi is started with a stop time setting means that cuts off the input circuit and then returns to release the cutoff of the input circuit of the reset command when the operating time has elapsed for a second set time.
Since the starting resistor inserted into the main circuit when starting up the tvJ generator remains at its rated capacity for a short time, no matter how many times it is restarted after a starting failure, the starting resistor will always remain at a certain amount of time. To provide a plate control device for a non-commutator motor generator that can cool a starting resistor during the process and control the starting of an electric valve [1] without heating and burning out the starting resistor. can.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing an embodiment of a motor generator control device according to the present invention; FIG. 2 is a time chart for explaining the operation of the program timer for reset detection shown in FIG. 1; Fig. 3 is a diagram showing the temperature state of the starting resistor due to the starting control of the same embodiment, Fig. 4 is a circuit diagram showing the main part of another embodiment of the present invention, and Fig. 5 explains its operation. Fig. 6 is a circuit diagram showing the main circuit configuration of a non-commutated motor generator for a vehicle, Fig. 7 is a circuit diagram showing a conventional motor generator control device, and Fig. 8 FIG. 2 is a diagram showing the temperature state of a starting resistor under conventional starting control. 3... Breaker, 5... Starting resistor short circuit electromagnetic contactor, 6... Starting resistor, 9...
...Thyristor bridge, 10...NvJ power generation Akebono, 11...Low voltage relay, 14...
・Voltage detector, 15... Reset command line, 16
... Reset relay, 17 ... Excitation coil of breaker 3, 18 ... Start timer,
1... Starting relay, 20... Exciting coil of the electromagnetic contactor 5 for shorting the starting resistor, 21...
- Start failure detection timer, 22... Start failure detection relay, 23... Program timer for reset detection, 24° 25... Time relay. Applicant's Representative Patent Attorney Takehiko Suzue Figure 1 Figure 2 Figure 3 Figure 4 List of Figures Figure 5

Claims (1)

[Claims] a starting means for starting the non-commutator motor generator through a starting resistor that forms a current-carrying path for the main circuit and is inserted into the main circuit on the condition that the input voltage on the power supply side is higher than a certain voltage; Starting time setting means for disconnecting the starting resistor from the main circuit on the condition that the output voltage of the motor generator reaches a predetermined voltage when a scheduled starting time has elapsed after the commutator motor generator was started. and the non-commutator is set when the non-commutator motor generator is started, and the starting resistor is not disconnected from the main circuit even after the scheduled starting time has elapsed by the starting time setting means. a starting failure detection means for detecting a starting failure of the child motor generator and causing the starting means to cut off the current carrying path of the main circuit; and a starting failure detection means for inputting a reset command to reset the starting failure detection means and for the starting means a reset means for restarting the reset command; and a reset means that operates when a first set time has elapsed after a reset command is issued by the reset means to cut off the input circuit for the reset command, and further operates for a second set time. A control device for a non-commutated motor generator, comprising a rest time setting means that returns to release the shutoff of the input circuit of the reset command after a period of time has elapsed.