JP5170063B2 - Electric load control device - Google Patents

Description

  The present invention relates to an electrical load control device, and more particularly to an electrical load control device that controls timing for supplying electricity to a plurality of electrical devices.

  When multiple electrical devices are connected to a single power supply unit and operated, these multiple electrical devices must start operating asynchronously because they start operating as needed. become. For this reason, two or more electric devices may start to operate simultaneously. This is shown in FIG. The upper part of FIG. 6 shows a state in which the device A that consumes 10 A of current and the device B that consumes 5 A of current start operation at different timings. On the other hand, the lower part of FIG. 6 shows a case where a device A that consumes a current of 10 A and a device B that consumes a current of 5 A start operating simultaneously. When the operation starts at the same time, the power supply device suddenly supplies 15 A of current from zero current.

  As described above, the case where the device A and the device B start to operate simultaneously is when they are simultaneously turned on by the operator. Even if the operation of the operator is not simultaneous, the device A and the device B may start operating simultaneously as a result due to the operation delay of the control device included in the device. In this way, when a plurality of electric devices start operating simultaneously, one power supply device suddenly supplies 15 A of current from zero current. In such a case, the supply current will change greatly for the power supply device instantaneously, and fluctuations in output power, deterioration of power supply equipment such as batteries, and cost increase due to the addition of protective equipment to prevent these changes Will have the problem of inviting.

  As means for solving this, Patent Document 1 (Japanese Patent Laid-Open No. 2002-264637) includes an electric load control device that starts or stops power supply at different timings with respect to a plurality of electric loads. There is disclosed a technique for controlling a sudden change in power by eliminating simultaneous operation and stop of devices. Further, in Patent Document 2 (Japanese Patent Laid-Open No. 2007-099065), when there is an operation request for a plurality of load devices at the same time, the control device controls the operation and non-operation according to a predetermined priority order. Thus, a technique for controlling an abrupt change in electric power is disclosed.

  A simplified representation of these proposals is shown in FIG. These prior patent documents always include a control device that centrally controls the operation of the load. Furthermore, in order to perform desired control with respect to each of the plurality of electric devices serving as loads, the plurality of electric devices and the control device are connected in advance by dedicated wiring. Therefore, for example, it is necessary to provide control in consideration of a case where a device that is not mounted as a standard (device E in FIG. 7) is added as an option. For this reason, there is a problem that a control method that must be provided in the control device in advance becomes complicated due to a combination of a plurality of electric devices, a combination type that is not mounted, or a difference in the type of the electric device itself.

  Further, since it is assumed that the control device performs control, a similar control method is required even in a simple electric device in which an operator such as a room lamp simply turns on a switch by pressing a switch. When an operator pushes a room lamp switch to light it, it is necessary to notify the controller of the switch information once and then the control device turns on the room lamp. As shown in device C and device D in FIG. 7, the wiring and circuit from the device to the control device and from the control device to the device become complicated, and even a single-function electric device requires an expensive control circuit such as a microcomputer. There is a drawback that.

  Patent Document 3 (Japanese Patent Application Laid-Open No. 2008-252961) discloses a technique for collectively managing power supply timing on the power supply device side, such as a radio base station in a mobile communication system. In Patent Document 3, the power supply timing is delayed by a control signal from the power supply device side so that the power supply timing does not overlap.

JP 2002-264637 A JP 2007-099065 A JP 2008-252961 A

  As described above, when a plurality of electrical devices are driven from a single power supply device, the plurality of electrical devices may operate simultaneously. When a plurality of electric devices operate simultaneously, there is a problem that stable operation of the power supply device cannot be performed by supplying a large current instantaneously from the power supply device. There is also a problem that an electric load control device for stable operation is complicated and expensive.

  The present invention provides an electric load control device that can control the operation timing of a plurality of electric devices with a simple configuration and can stably operate a power supply device.

  According to one aspect of the present invention, in an electrical system that supplies electricity to a plurality of electrical devices from a power supply device, timing that periodically generates a timing signal that controls timing to supply electricity to the plurality of electrical devices. Each of the generator and the plurality of electrical devices compares the timing signal with a reference level signal set to identify each electrical device, and outputs a coincidence signal when they match A conduction switch that conducts in response to the coincidence signal; and an operation switch that turns on and off the electric device, and the electric device in which the operation switch is turned on by an operator among the plurality of electric devices. An electrical load in which the conduction switch is turned on at the timing when the provided detection circuit outputs a coincidence signal and electricity is supplied from the power supply device Your device is obtained.

  According to another aspect of the present invention, in an electrical system configured to supply electricity to a plurality of electrical devices from a power supply device, the timing generator controls the timing of supplying electricity to the plurality of electrical devices. A timing signal is periodically generated, and when the detection circuit matches the timing signal and a reference level signal set for each of the plurality of electrical devices, a coincidence signal is output, and identification among the plurality of electrical devices is performed. When the operation switch of the electrical device is turned on by the operator of the electrical system, the conduction switch is turned on by the coincidence signal from the detection circuit of the specific electrical device, and power is supplied to the specific electrical device. When electricity is supplied from the device and the operation switch of the specific electrical device is in an OFF state, an electrical negative in which electricity is not supplied to the specific electrical device. Control method is obtained.

  ADVANTAGE OF THE INVENTION According to this invention, the electric load control apparatus which can operate | use a power supply apparatus stably is obtained, and it has an effect as described below. The first effect is that it is possible to control the timing of supplying electricity to the electric equipment connected to the power supply apparatus so as not to coincide with each other. The second effect is that an expensive and complicated control device or the like is not required for controlling these. The third effect is that control is possible with a single control line, and no complicated wiring is required. The fourth effect is that even when the number of devices is increased, it is possible to easily obtain the same effect without requiring complicated additional control.

It is a block diagram which shows the structure of the electric load control apparatus in the electric system which concerns on the 1st Embodiment of this invention. It is a pulse waveform diagram which is an example of a timing signal according to the present invention. It is a block diagram which is an example of the electric equipment concerning the present invention. It is a timing diagram explaining the electric supply to the electric equipment in this invention. It is a pulse waveform diagram which is another example of the timing signal according to the present invention. It is a figure which shows the change of the electric current value supplied from the electric power supply apparatus accompanying the operation | movement start of an electric equipment. It is a block diagram which shows the structure of the electric load control apparatus in the conventional electric system.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an electric load control device in an electric system according to an embodiment of the present invention. FIG. 2 shows a pulse waveform diagram as an example of a timing signal output from the timing generation circuit. In FIG. 3, an example of the block part of an electric equipment is shown. FIG. 4 is a timing chart for explaining the supply of electricity to the electrical equipment in the present invention. FIG. 5 shows a pulse waveform diagram as another example of the timing signal.

  The electrical system shown in FIG. 1 is composed of a timing signal generator 1, a common bus wiring 2, a power supply device 3, a standard-equipped electrical device group 4 (devices A to D), and an optional-equipped electrical device group 5 (device E). ing.

  The timing signal generator 1 outputs a timing signal for identifying each of a plurality of electrical devices. This timing signal is a periodic signal as shown in FIG. 2, for example. The common bus wiring 2 is a common wiring that transmits a timing signal from the timing signal generator 1 to each of a plurality of electrical devices. The power supply device 3 supplies electric power for operating each of the standard-equipped electrical equipment group 4 and the optional-equipped electrical equipment group 5. Taking a car as an example, it corresponds to an alternator that is a power generation device and a battery, and includes “+ (plus)” and “− (minus)” wirings as power lines for connecting electrical devices. The standard-equipped electric device group 4 is an electric device that is equipped as a standard in the electric system. The optional equipment electrical equipment group 5 is an electrical equipment that is installed as an option in the electrical system.

  FIG. 2 shows a pulse waveform diagram in which the voltage level is different for each cycle (T) as an example of the timing signal output from the timing generation circuit. In the present embodiment, the voltage level of each pulse is changed to v, 2 times v and 3 times v in the pulse period (T), and pulses of n kinds of voltage levels are repeated in the entire period nT time. This n is a natural number, which is equal to or greater than the number of “devices A to E” shown in FIG. I shall keep it. Here, each voltage level in each period (T) is a device-specific voltage level assigned to identify each of the devices A to E. For example, it is assumed that the voltage level v is assigned to the device A, 2v to the device B, 3v to the device C, 4v to the device C, and nv to the optional device E.

  FIG. 3 is an example of the devices A to E of FIG. 1, and will be described using the detection circuit for detecting the timing signal of FIG. 2 shown in the present embodiment, and an electric lamp (lamp) as an example of its operation. . The electric device includes a detection circuit including comparators 6 a and 6 b and an exclusive OR circuit 7, an operation switch 8, a thyristor 9, and a lamp 10. The timing signals output from the timing generator, the reference voltage Vref-H and the reference voltage Vref-L are input to the comparators 6a and 6b, and the voltage level of the timing signal, the reference voltage Vref-H and the reference voltage Vref- are input. The L voltage levels are compared. The reference voltage Vref-H and the reference voltage Vref-L are reference level signals for detecting a device-specific voltage level assigned to identify each device among the timing signals, and are set for each device. Is done.

  The outputs of the comparators 6a and 6b are input to the exclusive OR gate circuit 7. When the outputs of the comparators 6a and 6b do not match, the exclusive OR gate circuit 7 outputs a high level. The output from the exclusive OR gate circuit 7 is input to the thyristor 9, and when the output is at a high level, the thyristor 9 is turned on. The operation switch 8 is used for an on / off operation for an operator of the electric system to operate each electric device. The lamp 10 is an electric device and is a device to which electricity is supplied from the power supply device 3. As described above, the operation switch 8, the thyristor 9, and the lamp 10 are connected in series between the plus terminal and the minus terminal of the power supply device 3. When the operation switch 8 is turned on and the thyristor 9 is turned on, the plus terminal of the power supply device 3 is connected to the lamp, electricity is supplied to the lamp, and the lamp is lit.

  FIG. 4 is a timing chart for explaining the supply of electricity to the electric device shown in FIG. FIG. 4 shows waveforms showing the timing signal, the output of the comparator, the exclusive OR gate (Ex-OR gate) output, the ON / OFF state of the operation switch, and the ON / OFF state of the electric device (lamp). Yes. With reference to FIGS. 1-4, operation | movement of the electric load control apparatus in an electric system is demonstrated. As shown in FIG. 1, the timing generator 1 provided by the present invention repeatedly outputs signal pulses of n types of voltage levels for each period (T) shown in FIG. 2 at a period nT. In FIG. 1, the devices A to D are connected to the timing generator 1 by the common bus wiring 2. In the following description, as an example, it is assumed that the electric device C is a lamp and the device-specific voltage level assigned to the lamp is 3v.

  Reference voltages Vref-L and Vref-H are input to the minus terminals of the comparators 6a and 6b in FIG. The reference voltages Vref-L and Vref-H are set in advance as shown in FIG. In order to detect the voltage level 3v of the timing signal, the reference voltage Vref-L is a voltage lower than the voltage level 3v, and the reference voltage Vref-H is a voltage higher than the voltage level 3v. The voltage level of the reference voltage Vref-L is larger than the pulse voltage 2v output from the timing generator and smaller than 3v (2v> Vref-L> 3v). The voltage level of the reference voltage Vref-H is larger than the pulse voltage 3v output from the timing generator and smaller than 4v (3v> Vref-H> 4v). As described above, the reference voltage Vref-L or Vref-H which is the reference level signal is set to a voltage level slightly lower or higher than the voltage level of the corresponding timing signal.

  As shown in FIG. 4, the output of the comparator 6a outputs a low level when the timing signal is v or 2v, and outputs a high level only when a voltage level (3v or more) greater than the reference voltage Vref-L is input. On the other hand, the output of the comparator 6b outputs a low level when the timing signal is v, 2v, or 3v, and outputs a high level only when a voltage level greater than Vref-H (4 v or more) is input. The exclusive OR gate (Ex-OR gate) connected to the subsequent stage of the comparators 6a and 6b outputs a high level only when the input logic is different. In the electric device C in which the reference voltages Vref-L (2v> Vref-L> 3v) and Vref-H (3v> Vref-H> 4v) are set as the reference level signal, the pulse of the voltage level 3v of the timing signal is set. A high level is output from the Ex-OR gate corresponding to only the signal.

  In the electric device C, a high level is output from the Ex-OR gate corresponding to only the pulse signal having the voltage level 3v of the timing signal. A high level signal from the Ex-OR gate turns on the thyristor. As described above, the reference level signal is set for each electrical device so that a high level can be output from the Ex-OR gate in correspondence with only the assigned specific voltage level. Therefore, each electric device compares the input timing signal with the set reference level signal, and outputs a high level from the Ex-OR gate only at the assigned specific voltage level, and other than that, At the voltage level, a low level is output from the Ex-OR gate. Accordingly, the timings at which the Ex-OR gates of the respective devices output a high level are different and do not match.

  Here, when the operator turns on the operation switch 8 connected to the lamp 10 at an unspecified timing, since the thyristor 9 is not in the on state at the moment of turning on, electricity is not supplied and the lamp does not light up. , No power is consumed. However, the Ex-OR gate becomes high level in synchronization with the pulse signal of voltage level 3v output from the timing generator thereafter, the thyristor 6 is turned on, and the lamp 10 has a positive terminal and a negative terminal of the power supply device. The terminal is connected and the lamp lights up.

  Such a circuit is provided in the electric devices A to D, and a corresponding specific voltage is assigned to each of the electric devices A to D. The voltage levels of the reference voltages Vref-H and Vref-L are changed as reference level signals so as to correspond to the assigned voltage levels, and supplied to the comparator. Thus, by assigning n types of voltage levels output from the timing generator to the electric devices, the electric devices A to D can be turned on at different timings. Here, even when there is a device that is not connected as standard, such as the device E, the number of types of pulses n output from the timing generator is previously set larger than the number of devices predicted to be connected. By doing in this way, it is possible to operate in the same way also in the apparatus E added as an option after that, without requiring special control and wiring, and it becomes possible to obtain an effect.

  FIG. 5 shows a pulse waveform diagram as another example of the timing signal. The output signal of the timing generator, which is the constituent means of this patent, is not limited to that shown in FIG. 2, but the same effect can be obtained by outputting different waveforms periodically. FIG. 5A is a timing signal in which a pulse signal having n types of pulse widths of t to nt in a constant cycle (T) is repeated at a cycle of nT. FIG. 5B is a timing signal in which a pulse signal having n types of frequencies of nf to f is repeated at a cycle of nT in a constant cycle (T). In the case of these waveforms, the detection circuit shown in FIG. 3 in the embodiment is changed to a circuit that detects a pulse width or a frequency instead of a voltage level, but the specific means of these detection circuits can be easily configured. Description is omitted.

  In this embodiment, it is possible to generate the timing for turning on the power by adding a simple detection circuit as shown in FIG. However, in the case of a complicated device such as an in-vehicle navigation system, it is common that a control device is built in the device in advance, and the built-in control device can be used as a detection circuit. . When the control device is incorporated in the device as described above, it can be easily configured only by connecting the timing signal from the timing generation circuit to the detection circuit of the control device incorporated.

  The electrical load control device of the present invention can control the timing of supplying electricity from a common power supply device to a plurality of electrical devices. The electric load control device includes timing generation means, common bus wiring, a detection circuit provided in each electric device, a conduction switch, and an operation switch. The timing generation means generates a timing signal for controlling the timing of supplying electricity to each electric appliance. The common bus wiring connects the timing signal from the timing generator to all of the plurality of electrical devices. The detection circuit compares the timing signal with a unique reference level signal set for identifying each electric device, and outputs a coincidence signal when they coincide. The conduction switch is turned on by a coincidence signal from the detection circuit. The operation switch is a switch for an operator of the electric system to turn on / off the electric device. Among the plurality of electric devices, an electric device whose operation switch is turned on by an operator is supplied with electricity when the detection circuit provided in the electric device outputs a coincidence signal. become.

  By setting a unique reference level signal for each of the detection circuits of a plurality of electrical devices, the timing at which the coincidence signal is output from the detection circuit can be varied. By using this coincidence signal to control the timing of supplying electricity to the electrical device, an electrical load control device that controls that a plurality of devices start operating simultaneously can be obtained. By varying the operation start of the plurality of devices by the electric load control device, fluctuations in the output power of the power supply device and deterioration of the power supply device such as a battery can be prevented, and a power supply device capable of stable operation can be obtained. According to the present invention, it is possible to obtain an electrical load control device and an electrical load control method capable of controlling the operation timings of a plurality of electrical devices and stably operating the power supply device with a simple configuration.

  Although the present invention has been described with reference to the exemplary embodiments, the present invention is not limited to the above exemplary embodiments. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Timing generation circuit 2 Common bus wiring 3 Electric power supply device 4 Standard equipment electrical equipment group 5 Optional equipment electrical equipment group 6a, 6b Comparator 8 Operation switch 9 Thyristor 10 Electrical equipment (lamp)

Claims (11)

A plurality of electrical devices that are supplied with electricity from a power supply device, and a timing generator that periodically generates timing signals for controlling the timing of supplying electricity to the plurality of electrical devices,
Each of the plurality of electrical devices is
A detection circuit that compares the timing signal with a reference level signal set to identify each electric device and outputs a coincidence signal when they coincide;
A conduction switch that conducts in accordance with the coincidence signal;
An operation switch that accepts an operation to turn on and off the electrical device,
When the operation switch of the electrical device is in the ON state, if the detection circuit of the electrical device outputs a coincidence signal, the conduction switch of the electrical device is turned on according to the coincidence signal, and the power supply device connects to the electrical device. An electric load control device characterized in that supply of electricity is started .   The electrical load control device according to claim 1, wherein the timing signal output from the timing generation circuit is supplied to each of the plurality of electrical devices through a common signal bus wiring.   The electrical load control device according to claim 1, wherein the timing generation circuit outputs a timing signal for each period.   The electric load control device according to claim 1, wherein the conduction switch is a thyristor.   5. The electric load control device according to claim 1, wherein the timing signal is a pulse signal having different voltage levels.   The electric load control device according to claim 1, wherein the timing signal is a pulse signal having different pulse widths.   The electric load control device according to claim 1, wherein the timing signal is a pulse signal in a different frequency band. An electrical load control method in an electrical system configured to supply electricity to a plurality of electrical devices from a power supply apparatus, wherein a timing signal for controlling a timing at which a timing generator supplies electricity to the plurality of electrical devices is periodically Generating a coincidence signal when the detection circuit coincides with the timing signal and a reference level signal set in each of the plurality of electrical devices,
When an operation switch of a specific electrical device among the plurality of electrical devices is turned on by an operator of the electrical system, the conduction switch is turned on by a coincidence signal from the detection circuit of the specific electrical device. , Electricity is supplied from the power supply device to the specific electrical equipment,
When the operation switch of the specific electrical device is in an OFF state, the electrical load control method is characterized in that electricity is not supplied to the specific electrical device.   9. The electric load control method according to claim 8, wherein the timing signal is a pulse signal having different voltage levels.   The electric load control method according to claim 8, wherein the timing signal is a pulse signal having different pulse widths.   The electric load control method according to claim 8, wherein the timing signal is a pulse signal of a different frequency band.

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