TW200843323A - Fan motor controller and fan motor control method - Google Patents

Abstract

Generation of strange sound is suppressed while protecting a power element and the operable area of a fan motor is restrained from becoming narrower by controlling repetition of interruption and reset of a signal delivered to the fan motor. When overcurrent of a brushless DC motor is detected, a fan motor controller interrupts a signal delivered to the brushless DC motor. Subsequently, a modulation factor maximum limit value is set such that the modulation factor is limited to satisfy a condition that the modulation factor of a signal delivered to the brushless DC motor falls within a range of the modulation factor when an overcurrent is detected (S52, S53). When the modulation factor maximum limit value is less than a preset lower limit value (S54: No), that lower limit value is set as the modulation factor maximum limit value (S55).

Description

200843323 IX. Description of the Invention: The present invention relates to a fan motor control device and a fan motor control method for controlling the driving of a fan motor. [Prior Art] In the conventional fan motor control device, when an overcurrent flows to the fan motor, the signal output to the fan motor is blocked for a specific period of time, and then the output is started. However, in the above-described conventional fan motor control device, even if the fan that is rotated by the fan motor receives the resistance of the wind, the signal output to the fan motor is interrupted for a certain period of time and then the output is detected again. An overcurrent is generated so that the signal output to the fan motor is blocked. Therefore, an abnormal sound is generated due to the interruption of the signal output to the fan motor and the reversal of the recovery. Further, since the output of the fan motor is interrupted and resumed, the power element supplying power to the fan motor is abnormally heated. Further, if the signal output to the fan motor as described above is repeatedly blocked and restored, the speed of the fan is lowered due to the repetition of the interruption and recovery. Therefore, the rotational speed of the fan is separated from the rotational speed command indicating the rotational speed of the fan, so that an overcurrent is generated when returning to the normal state, so that the signal output to the fan motor is again blocked, thereby causing repeated output to the fan motor. The problem of signal interruption and recovery. Therefore, a technique is proposed to control the rotational speed of the fan motor based on the current value flowing to the fan motor (for example, refer to Patent Document 1). In the fan motor control device disclosed in Japanese Patent Publication No. 130030.doc 200843323, when the input current is detected When the current value of the flow to the fan motor detected by the circuit is greater than or equal to a specific value, the command rotational speed indicating the rotational speed of the fan is lowered, thereby preventing the finger output to the fan motor from being blocked. A case where the signal output to the fan motor is blocked and recovered. [Patent Document 1] Japanese Patent Laid-Open Publication No. H-286179 (Invention)

[Problem to be Solved by the Invention] In the fan motor control device disclosed in Patent Document 1, the rotation speed of the fan motor is controlled based on the current value flowing to the fan motor, and therefore it is necessary to measure the current value of the inch (10) to the fan motor. The input current detection circuit. As a result, the cost of the fan motor control device increases. Further, in the fan motor control device disclosed in Patent Document 1, when the overcurrent stopping circuit for stopping the output operation of the fan motor is activated, the rotation speed of the fan motor is lowered, and the operable region of the fan motor is changed. Narrow problem. Therefore, the second invention has been developed to solve the above problems, and the object thereof is to provide a fan motor control device and a fan motor control unit, which can suppress the interruption and recovery of the signal outputted to the fan motor. Inversely, it suppresses the generation of an abnormal sound while protecting the power element, and suppresses the narrowing of the operable region of the fan motor. [Technical means to solve the problem] :: The fan motor control device of Erming has a control mechanism for controlling the fan to be controlled, and a control mechanism for detecting the flow to the fan motor 130030.doc 200843323 The value of the machine has reached a certain value The overcurrent detection mechanism above. Moreover, when the overcurrent of the fan motor is detected by the current detecting mechanism, the control mechanism blocks the signal that is turned to the fan motor, and then the signal output to the fan motor is controlled to be lower than the overcurrent detection. The variability is small and the signal is output to the fan motor again. /Hai fan motor control device 'When overcurrent flows to the fan motor, temporarily: interrupts the signal output to the fan motor, and then starts outputting at a modulation rate that is controlled to be smaller than the modulation rate when overcurrent detection is detected. Therefore, it is possible to suppress the case where the fan motor generates an overcurrent again after the output is restarted. Thereby, the signal outputted to the fan motor after the output of the port σ can be suppressed from being interrupted again, so that I can suppress the interruption and recovery of the signal output to the fan motor. As a result, abnormal sound can be suppressed due to the interruption of the signal outputted to the fan motor and the recovery is repeated, and the power element can be protected. And 'different from the current value flowing to the fan motor to reduce the rotation of the fan motor, and thus preventing the signal output to the fan motor from being interrupted, the fan motor control device can operate the fan motor according to the commanded rotation speed. Until it has been generated, there is no problem with the operable area of the fan motor. Further, since it is necessary to provide an input/spring detecting circuit for measuring the value of the flow to the fan motor, the fan motor control device can be constructed inexpensively only by the input current detecting circuit. The second issue. The fan motor control device of the present invention includes: a control mechanism for controlling the fan motor to be driven; and an overcurrent detecting mechanism for detecting that the current value flowing to the fan motor has reached a certain value or more. Moreover, when the over-current of the fan motor is detected by the dream mechanism, the control mechanism 130030.doc 200843323 will output the modulation rate to the fan motor: * overcurrent detection and then start outputting the output to the fan motor. The signal to the fan motor is limited to the modulation rate and signal in the range where the modulation rate is small when the following conditions are satisfied. The wide fan motor control is in the middle of the vibration, when the overcurrent flows to the fan & cut off the output to the fan motor, the current value = the variability and then the output is output, that is, the modulation rate is overproduced when the current is detected. The modulation rate of the circumference 'can therefore suppress the flow after the output is resumed. Thereby, the output of the rearward fan motor can be suppressed from being restarted; the tiger is again occluded, so that the output to the fan motor can be suppressed from being repeated and resumed, and as a result, the signal outputted to the fan motor can be suppressed. And the recovery can be repeated to protect the power components at the same time. The production time is ten, and the speed of the fan motor is reduced according to the current value flowing to the fan motor to prevent the signal output to the fan motor from being interrupted. The money fan motor control device can operate the fan motor to = overcurrent according to the commanded speed. Therefore, 'the problem is that the operable area of the fan motor is not generated. 'Because it must be set to measure the flow to the fan motor. The value of the input current detecting circuit is such that the fan motor control device can be configured inexpensively by the wheeled current detecting circuit. The fan motor control device according to the third aspect of the invention is the fan motor control device of the second invention: wherein the control mechanism The condition related to the modulation rate of the signal output to the fan motor by the output signal to the fan motor is resumed. The control device can be restored from the state of restricting the operation of the fan motor back to 130030.doc 200843323. The fan motor control device of the first example is the first device, wherein the fan motor control control mechanism of _ φ is restarting from the beginning. When the I/O of the fan motor output signal is measured and the overcurrent is measured, the signal of the output of the heart, the lower part, the lower part, and the fan motor is removed from the first specific time. <5 The fan motor control device is set to be in the state of restarting from the point of reopening, and when the state of the output signal of the motor is raised and the overcurrent is not detected, the wn 6 r, The limitation of the specific time of the younger brother is 1. In this case, the fan speed of the rotating fan is adjusted to the frequency of the over-current detection, and the fan motor is used. After the operation is stabilized, the fan 4 can be reverted to the normal operation at the 7th speed. χ曰=Invented fan motor control device such as ~4th invention =: motor control device", when it is desired to start the fan again Motor output k 7 When the rate goes, the A g structure is no longer the door ^ When the tempering rate is small, the control mechanism no longer starts to output signals to the fan motor. The fan motor control device is in the modulation of the minimum modulation rate When the overcurrent is detected when the signal is output to the fan motor, the overcurrent is detected again due to the failure of the part. Therefore, when the modulation rate is not the minimum value when the signal is to be output to the fan motor. The output of the invention is further reduced. The result is that the fan motor control device according to any one of the fourth to fourth inventions of the present invention can be prevented from being outputted by any of the second inventions. 'When you want to start to send the fan motor to 13030.doc 200843323, the modulation rate is less than the preset minimum modulation rate, the control machine = so that the modulation rate of the signal output to the fan motor will not be The control is applied in such a way that the minimum transfer rate is exceeded and the signal is again output to the fan motor. In the fan motor control device, in the case where an overcurrent is detected even when a signal is output to the fan motor at a modulation rate of the minimum modulation rate, most of the cases are due to noise that does not interfere with the operation of the fan motor. Overlap causes overcurrent to occur in a continuous manner, because Λ 'is controlled to not be less than the minimum modulation

The rate modulation rate begins to output a signal to the fan motor. Thereby, it is possible to prevent the operation of the fan motor from being stopped due to the overlap of the noise that does not interfere with the operation of the fan motor. A fan motor control device according to any one of the first to sixth aspects of the present invention, wherein the control means passes the second specific time when the signal output to the fan motor is blocked. At this time, the signal is output to the fan motor. : In the fan motor control unit, the signal from the output of the interrupted output to the fan motor has passed the 2nd tweeting skill ^ b special time, and the signal is immediately output to the fan motor. As a result, in the state where the signal output to the fan motor is blocked, the fan of the switch is not stopped, and the rotating fan does not stop, so that the signal is immediately output to the fan motor. . The fan motor control device of the invention of the eighth invention is controlled by the fan motor of the invention. The τ η Τ Τ 工 工 工 工 工 工 工 工 工 工 工 工 工 工 工 工 工 工 。 。 。 。 。 。 。 。 。 。 The electric-only dual-measurement mechanism does not detect the over-current, and then starts to output a signal to the fan motor. In the fan motor control device, when the overcurrent is not detected, the 130630.doc 200843323 is turned on to output the signal to the fan motor, so that the overcurrent can be generated immediately after the output is restarted. The fan motor control method according to the ninth invention is a fan motor control method for controlling the output to the fan motor, and when the overcurrent flows to the fan motor, the signal output to the fan motor is blocked, and then output to the fan. The cycle rate of the motor is controlled to be smaller than the modulation rate during overcurrent detection, and the signal is again output to the fan motor. In the fan motor control method, when an overcurrent flows to the fan motor, the signal that outputs the k/f output to the fan motor is temporarily held, and then the modulation rate is controlled to be smaller than the modulation rate of the overcurrent k. The output is started, so that it is possible to suppress the overcurrent of the fan motor when the output is restarted. Thereby, the signal outputted to the fan motor after the output is suppressed can be blocked again, thereby suppressing the interruption and recovery of the signal outputted to the fan motor, and the output can be suppressed to the fan. The signal of the motor is interrupted and recovered repeatedly to produce an abnormal sound, and at the same time. And, in the case of reducing the rotation speed of the fan motor according to the current value flowing to the fan motor and thereby preventing the signal output to the fan motor from being interrupted, the z-fan motor control method can operate the fan motor according to the commanded rotation speed. Since the current is up to 2, the problem of the operable area of the fan motor does not occur. Further, since it is necessary to use the input current detecting circuit for measuring the current value flowing to the fan motor, the fan motor control method can be easily provided only by the input current detecting circuit. The fan motor control method of the invention 10 is a control fan motor control method for the output to the fan motor 130030.doc 12 200843323. When the power is over $, the output of the fan motor is cut off to the (four) fan motor signal. The word output to the fan motor is a modulation rate P' at the time of the modulated current detection that satisfies the following conditions. Next (4) 'and then start to output to the fan motor, in the fan motor control method 'when the overcurrent flows to temporarily interrupt the output to the fan motor violates ", m "the tiger is then limited to meet the rate of (4) and then start output, In other words, the modulation rate in the range of the small change in the current detection is smaller than that in the current detection. Therefore, it is possible to suppress the overcurrent from being generated again in the second phase when the output is restarted. This can suppress the restart of the output and then the fan motor. The signal is again blocked, so that the interruption and recovery of the signal generated by the heart fan motor can be suppressed. The result can be abnormally caused by the reverse of the interruption and recovery of the signal output to the fan motor. The sound can protect the power component at the same time. It is different from the case where the speed of the fan motor is reduced according to the current value flowing to the fan motor and the signal output to the fan motor is prevented from being interrupted. The fan motor control method can be The commanded rotation speed is used to operate the fan motor until an overcurrent is generated. Therefore, there is no problem that the operable region of the fan motor is narrowed. X, since it is necessary to utilize Since the input current detecting circuit that regulates the current value of the fan motor is provided, the fan motor control method can be provided inexpensively by the input current detecting circuit. [Effect of the Invention] As described above, the present invention can obtain the following effects. In the first and second inventions, it is possible to suppress the signal output to the fan motor 13030.doc -13-200843323 from being restarted after the output is restarted, and the signal output to the fan motor can be suppressed from being interrupted and restored. As a result, it is possible to suppress an abnormal sound due to the repetition of the interruption and recovery of the output of the fan motor, and to protect the power element. Further, in the first and second inventions, the command rotation speed can be made. Since the fan motor is operated until an overcurrent is generated, there is no problem that the operable region of the fan motor is narrowed. Further, in the second and second inventions, it is necessary to provide an input for measuring the current value flowing to the fan motor. Since the current detecting circuit is configured, the fan motor control device can be configured inexpensively only by the input current detecting circuit. Further, in the third and fourth inventions, the fan horse can be used. In the fifth invention, the output can be prevented from being restarted at any time regardless of the presence or absence of damage to the component. Further, in the sixth invention, the operation of the fan motor can be prevented. In the seventh aspect of the invention, even if the signal output to the fan motor is blocked, the rotating fan does not stop due to inertia. In this way, it is possible to start the output of the signal to the fan motor. In the eighth aspect of the invention, it is possible to suppress the occurrence of an overcurrent immediately after the restart of the output. Further, in the ninth and tenth aspects, the output can be suppressed from being restarted. The signal output from the rear fan motor is blocked again, which suppresses the output of the output to the fan motor and the recovery of the signal. The result is that the output to the fan motor is blocked and restored. Repeatedly produces an abnormal sound, 130030.doc -14- 200843323 The same day can be guaranteed to comply with power components. χ, in the ninth and ninth inventions, the fan motor can be operated until the overcurrent is generated according to the index rotation speed, so that the operable region of the f-wire fan motor is not narrowed. It is necessary to use the input "core circuit for measuring the current value flowing to the fan motor in the ninth and the ninth. Therefore, the fan motor control method can be inexpensively provided only by the input current detecting circuit. [Embodiment] (Embodiment 1) A block diagram of a fan motor control device according to a first embodiment of the present invention will be described. Referring to Fig. 1, a configuration of a fan motor control device 1 according to an i-th embodiment of the present invention will be described with reference to Fig. 1. . In the fan motor control device i of the present embodiment, the brushless motor that rotates the fan 2 is controlled (the driving of the motor 3 is controlled, and the brushless motor 3 is installed in the indoor unit of the air conditioner or In the outdoor unit, the brushless DC motor 3 applies a three-phase output voltage outputted by the inverter circuit 2A described below to each of the fixed sub-coils 3a to rotate the rotor 3b, thereby increasing the fan: The brush DC motor 3 is provided with three Hall effect sensor thieves 3c'. The position signals sent by the Hall effect sensors 3c are output to the position of the microcomputer 3, and the speed detecting unit 31. The motor control device 1 includes a converter circuit that generates a DC voltage from an AC voltage supplied from an AC power source, and an inverter circuit 2 that outputs a DC voltage supplied from the converter circuit 10 to a three-phase AC voltage microcomputer 30'. The sinusoidal driving method controls the brushless DC motor 3 and the overcurrent detecting circuit 40, and detects the current flowing in the brushless dc motor 3 130030.doc 15 200843323 The current value has reached a certain value or more. The micro electric thin 30 series is The operation of the inverter circuit 2 is controlled, and the output gate signals Gu, Gx, Gv, Gy, Gw, and &, the gates: indicate the switching elements provided in the inverter circuit 2? 21 is switched between ON and OFF: The microcomputer 30 includes a position and speed detecting unit 31, a drooping control unit 32, a speed control unit 33, a sine wave modulation unit, and a drive signal generating circuit 35. ° ~ f

The position and speed detecting unit 31 inputs the position signals Hu, Hv & Hw detected by the no-brush 〇 (the Hall effect sensor 3c of the motor 3), and calculates the no-brush based on the period of the positions 佗唬Hu, Hv, and Hw. The current rotation speed of the Dc motor 3. The droop control unit 32 receives the overcurrent detection signal detected by the overcurrent detection circuit 4A, and outputs the modulation rate maximum limit value to the speed control unit 33. The modulation rate maximum limit value The modulation rate maximum limit value is updated based on the number of times the overshoot is generated during the current detection, and is output to the speed control unit 33. Specifically, the droop control unit 32 The modulation rate maximum limit value which is decreased as the number of times of continuous overcurrent generation increases is output to the speed control unit 33. Further, in the present embodiment, the updated maximum modulation rate limit value is at a preset lower limit. When the value is equal to or lower than the value, the lower limit value is output as the maximum rate of the modulation rate to the speed control unit 33. That is, "the overcurrent is continuously generated in the brushless DC motor 3, so that even at the maximum modulation limit value. When it is smaller, it is not smaller than the preset lower limit value. The speed control unit 3 3 outputs the current 130030.doc -16-200843323 based on the position and speed detecting unit 31.

The C rotation speed, the externally supplied speed command, and the maximum modulation rate limit value output from the droop control unit 32, the modulation rate command is output to the sine wave modulation unit 34, and the modulation rate command is used to set the inversion. The output voltage of the circuit 20 is an instruction of the upper limit of the private pressure of the wave south value. Specifically, the speed control unit 33 counts the deviation between the current rotation speed and the speed command outputted by the position and speed detecting unit 31, and outputs a modulation rate command corresponding to the deviation to the sine wave adjustment port 34. . When the control unit 32 is turned down and the modulation rate maximum limit value is output, the speed control unit 33 limits the modulation rate of the modulation rate output to the sine wave modulation unit 34 to 7 It is made equal to or less than the maximum limit value of the modulation rate outputted by the droop control unit K. The sine wave modulation unit 34 generates an action finger + based on the modulation rate command outputted by the speed control unit 33, the position signal output from the position and speed detecting unit 31, and the current rotational speed. Extremely, one, Gv, Gy, Gw, G—:: The generated action command is output to the drive signal generating circuit 35. Here, the operation command is composed of a u-phase action command, a v-phase action command, and a w-phase action. The drive signal generating circuit 35 sets the gate drive circuit 22 of the idler signal Gu, Gx, Gv, Gy, Gw, Gz_^ to the circuit 20 based on the action command 'outputted by the sine wave modulation unit 34'. The drive signal generation circuit adds the idle sign by the timing provided by the load timer of the brain 30 (refer to Fig. 5). Further, when the overcurrent detection circuit of the overcurrent detecting circuit 4 is input, the drive signal generating circuit 35 causes the output of the gate signal outputted to the inverter circuit 20 to stop at the output of the gate signal in the dynamic circuit 22. 130030.doc -17- 200843323 The gate driving circuit 22 outputs a gate driving signal according to the idle signal Gu, Gx, Gv, Gy, Gw, Gz outputted by the driving signal generating circuit 35, and the gate driving signal indicates the opposite The switching elements 2 of the phase circuit 20 are switched between on and off. Thereby, the three-phase output voltage outputted from the inverter circuit 2A is applied to the respective fixed sub-coils of the brushless DC motor 3 to rotate the rotor 3b, whereby the fan 2 rotates.

Figure 2 to Figure 4 are for illustration! A flow chart of the fan motor control method of the illustrated fan motor control unit. Fig. 5 is a schematic diagram showing the relationship between the load timer, the micro-power: the output voltage waveform, the DC-phase current waveform of the inverter circuit, the overcurrent detection signal, the modulation-rate limiting process, and the load interrupt processing. Fig. 6 and Fig. 7 are graphs showing the maximum value of the modulation rate output set during overcurrent detection. Next, a fan motor control method of the fan motor control device according to the first embodiment will be described with reference to Figs. 2 to 7 . As shown in FIG. 5, the fan motor control device performs the load interruption at the timing provided by the load meter of the microcomputer (40 μ8 〜·), in the load_break processing, as shown in FIG. 2, First, it is judged whether or not the gate signal from the drive is turned off: 35, whether the gate signal output to the inverter circuit 20 is blocked, and the gate signal is output to the inverter circuit 20 (S1. ::, judge, DC motor Whether it has been produced in 3). With "road 40 and ^ connected to no brush 〇": overcurrent detection of the DC part of motor 3: 峋 no electric micromotor 3 to make there is an overcurrent flowing. ..., after 'as shown in Figure 5, as a helmet Christine (S2 H brush Dc motor 3 has an overcurrent brush DC^ 1 'Reset the counter'. This counter measures the discontinuous generation of overcurrent from the time when the signal is output to the helmet wheel again. 130030.doc 200843323 (S3). Then the gate signal of the 'round-to-inverter circuit 2' is blocked (S4). Thereafter, the modulation rate limiting process (§5) is performed. /Weighing rate limiting processing (S5) A subroutine (one (four)) that limits the modulation rate of the upper limit of the voltage wave height value of the output voltage of the inverter circuit 2〇 when the output is detected after the overcurrent detection (in the case of the modulation rate limit) As shown in Fig. 3, the tile first determines whether the maximum modulation limit value (S51) is set. When the maximum modulation limit value is not set (S51 ·· Ν' as shown in item 6, the modulation rate is set. The maximum limit value is set to a lapse rate that satisfies the following conditions, that is, a range in which the modulation rate is smaller than that in the overcurrent detection (four). In terms of body, as shown in Fig. 6(4), when the change of the modulation rate after the overcurrent is generated increases with time, it is limited to the corresponding maximum modulation rate and the output X' is as shown in Fig. 6(8). When the modulation rate after the current is generated is shifted up and down with the maximum limit value of the modulation rate, the portion of the modulation rate maximum If value is limited to the maximum limit value of the modulation rate, and the modulation is not full. The portion of the maximum limit value is output as it is. In addition, as shown in Fig. (10), the modulation rate after the overcurrent is generated is less than the maximum limit value of the modulation rate within 1巳, and the output is output as it is. Then, the modulation rate limiting process ends. On the other hand, when the modulation limit maximum limit value is set (S51: Yes), as shown in FIG. 7, 'the modulation rate maximum limit value is lowered by a specific amount to be updated ( S53) The processing of the step S53 is performed when the overcurrent is continuously detected. Then, it is determined whether the updated maximum modulation rate limit value is above the preset lower limit value (S54). The updated modulation rate maximum limit value is preset When the limit value is above (S54: for example), the 130030.doc -19- 200843323 variability limit processing ends. When the updated modulating rate maximum limit value is less than the preset lower limit value, d) will be modulated. The rate limit value is set to the lower limit value (S55), and the modulation rate limiting process is terminated. Therefore, even if the maximum rate of the modulation rate is gradually decreased in the case where the overcurrent is continuously generated in a continuous manner, The modulation limit maximum limit value is not controlled by the lower limit value. After the variability limiting process (S5) is completed, as shown in FIG. 2, the load interruption process ends, and the next load interruption process is executed. Further, since the overcurrent (8) is detected in the previous load interruption processing, for example, 'the output of the closed-loop signal is interrupted to the inverter circuit 20 (岣(S1 'Μ' restarts to the inverter circuit 20). Output gate signal (S6). Therefore, when the time has elapsed from the point when the output of the inverter circuit is blocked (the point S4 in the previous load interruption processing) to the time point S6 of the current load interruption processing ,, -31- And then start to brushless DC horse

C Π The modulation rate at the start of output is limited to the modulation rate as follows: L, which is smaller than the above-mentioned modulation rate limit: tune: the maximum limit value of the execution rate. Thereafter, the load interrupt processing: bundle, sub-subscribing to the next load interrupt processing.

In the load interrupt processing towel, when there is no brush D current (8): N. ), update the counter, the count is no brush DC motor 3 rounds out, gentleman ... Shili 仗 and then start to the front door (10) technology discontinuously generate over current = (). In addition, it is judged that the value of the counter is a fixed value or more (S8), and when the count is crying, the load is interrupted, the load is interrupted, the money is a specific value (S8: No), and the bundle is executed under a load. Interrupt processing. Further, in the case of 130030.doc -20-200843323, when the value of the counter is equal to or greater than a specific value (S8 ·· Yes), the tempering rate mitigation processing (S9) is performed. In other words, in the present embodiment, when the signal is output from the time when the signal is output to the unauthorized brush DC motor 3 for a predetermined period of time and the overcurrent is not detected, the modulation rate relaxation processing is executed (S9). This modulation rate relaxation processing (S9) is a subroutine for mitigating the maximum modulation rate limit value set in the modulation rate limitation processing shown in Fig. 3. As shown in Fig. 4, in the modulation rate mitigation process, first, it is judged whether or not the modulation rate is set most.

Large limit value (S91). Next, when the modulation rate maximum limit value is not set (S91 · No), the modulation rate relaxation processing is directly ended in this state. On the other hand, when § a adjusts the maximum variability limit value (S9丨: Yes), the adjustment rate is increased by a certain amount to be updated (s92). In this way, the modulation rate mitigation process ends. After the modulation rate relaxation processing (S9) is completed, as shown in Fig. 2, the load interruption processing is ended, and the next load interruption processing is executed. In this way, the fan motor control device 1 of the first embodiment is controlled. [Features of the present fan motor control device] The fan motor control device 1 of the present embodiment has the following features. In the fan motor of the present embodiment, in the U1, when the overcurrent is not applied to the brushless DC motor 3, the output of the brushless DC motor 3 is temporarily blocked. Is it full? The g ^ ′, and 'the modulation rate of the following conditions are started to output again', that is, the modulation rate of the range where the degree of the ^ ^ ° is smaller than that of the over-current detection, so that it is possible to suppress the number of times of the hand after the restart of the output. # , 心达3 will generate a thunderbolt again. Hunting this, can suppress the start of the wheel ^ ^ after the output to the brushless DC motor 3 will be interrupted again, so that the output can be produced to no brush DC Ma 130030.doc 200843323 The interruption and recovery of the signal in the 3rd is repeated. As a result, it is possible to suppress an abnormal sound due to the reversal of the signal outputted to the brushless DC motor 3 and the recovery. At the same time, the power element can be protected. Further, the fan motor of the present embodiment is different from the case where the current value of the fan motor is reduced in accordance with the current value of the fan motor to prevent the signal output to the fan motor from being blocked. The control device 使 can operate the brushless DC motor 3 until an overcurrent is generated according to the speed command. Therefore, the problem that the operable region of the brushless DC motor 3 is narrowed does not occur. Since the input current detecting circuit that measures the current value flowing through the brushless DC motor 3 is used, the fan motor control device 1 can be configured inexpensively by the input current detecting circuit. Further, in the fan motor control device of the present embodiment, When the signal is output from the time when the signal is output to the brushless DC motor 3 for a certain period of time and the overcurrent is not detected, the modulation rate relaxation processing (89) is executed. Thereby, the vehicle is used to wrap/claw; The modulation rate of the range in which the modulation rate of the Japanese Guardian is small is adjusted to stabilize the operation of the fan motor, and the fan motor can be returned to the normal operation according to the commanded rotation speed. In the fan motor control device, even if the signal is output to the brushless DC motor 3 at a modulation rate of less than the value, the over-charging machine is detected, and in many cases, the operation of the brushless DC motor 3 is prohibited: If the weight is §, the over-current ☆ is generated. Therefore, the lower limit value is used as the adjustment rate to take the + limit value (S55), and then the signal is output to the brushless DC motor 3 (S6). Brushless motor 3 Heavy noise of the "cause of the operation of the fan motor stops. , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , 〇^ When the point (the time before the load ^ processing center) is up to the time of the S6 day guard point in the current load interruption processing, immediately start the lack of ^ ^ I, , brush DC motor 3 output letter 2: Therefore, even if the signal output to the brushless DC motor 3 is obscured, the rotating fan does not stop due to inertia, and the signal can be immediately output to the brushless DC motor 3 in this manner. (Second embodiment) Fig. 1 is a block diagram of a fan motor control device according to a second embodiment of the present invention. In the fan motor control of the first embodiment, "g does not exceed 1A, when the overcurrent % is set, the maximum modulation limit value is set" and the limit is adjusted to satisfy the following modulation rate of the stop to restart the output. Unlike the modulation rate in the range where the variability is smaller than the maximum limit value of the modulation rate, the second embodiment describes the fan motor control device 100. When the fan motor control device 100 generates an overcurrent. The modulation rate is reduced by a specific amount and controlled to be smaller than the modulation rate at the time of overcurrent detection. Further, the same as the above-described i-th embodiment except for the drooping control unit and the speed control unit The description of the same reference numerals is omitted. As shown in Fig. 8, the droop control unit 132 of the cymbal computer 13 provided in the fan motor control farm 100 of the second embodiment inputs the overcurrent detected by the overcurrent detecting circuit 40. The detection signal is output to the speed control unit 13 3. The speed control unit 133 is based on the rotational speed output from the position and speed detecting unit 31, the speed command supplied from the outside, and The control unit (1) 130030.doc -23- 200843323 outputs the modulation rate control signal, and outputs a modulation rate command for setting the upper limit value of the voltage wave high value of the output voltage of the inverter circuit 2 to the sine wave. Specifically, the speed control unit 133 calculates the deviation between the current rotation speed and the speed command outputted by the position and speed detecting unit 31, and outputs a modulation rate command corresponding to the deviation to the sine wave modulation. In the case where the modulation rate control signal is input by the droop control unit 132, the speed control unit 133 causes the output according to the modulation rate control signal.

The modulation rate of the modulation rate command to the sine wave modulation unit 34 is decreased by a specific amount so that the - (four) rate becomes a modulation rate smaller than the modulation rate at the time of overcurrent detection. In the present embodiment, when the modulation rate after the specific amount is decreased by a predetermined lower limit or lower, the lower limit value is output to the sine wave modulation unit 34 as a modulation rate command. 9 and 10 are flowcharts for explaining the wind control method of the fan motor control device shown in Fig. 8. Fig. 9 and Fig. 12 are graphs showing the modulation rate of the overcurrent detection and the reduction of the specific amount. Next, a fan motor control method will be described with reference to Fig. 9 to Fig. 12. In the fan motor control unit (10), load interruption processing is executed at a timing (40 heart fan% interval) provided by the microcomputer % load timing crying. : In the interrupt processing, as shown in FIG. 9 'f first, it is judged whether the gate signal output from the driving signal generating stroke 35 to the inverted crying drink + Han phase & 9 channel 20 is blocked. When the pole signal is output to the inverter circuit 2〇=N.), it is judged whether or not an overcurrent is generated in the brushless DC motor 3. Specifically, by connecting to the brushless 〇, the overcurrent detection of the DC portion of the motor 3 The circuit 4 determines whether there is an overcurrent of 130030.doc -24-200843323 flowing in the brushless DC motor 3. Then, when an overcurrent occurs in the brushless DC motor 3 (s: Yes), it is output to the inverter circuit. The gate signal of 20 is interrupted (§1〇3). Thereafter, Modulation rate control processing (S104) The modulation rate control processing (S1〇4) is an upper limit value of a voltage wave high value for setting an output voltage of the inverter circuit 20 when the output is detected after overcurrent detection. The modulation rate is reduced by a specific amount of the subroutine. The modulation rate control process shown in FIG. 1A causes the modulation rate calculated based on the current rotational speed and the speed command outputted by the position and speed detecting unit 31 as shown in FIG. The fixed amount is reduced so as to be smaller than the modulation rate when the overcurrent is generated (S141). Specifically, in any of the following cases, the modulation rate after the overcurrent is generated is adjusted to the ratio of the overcurrent. The method of reducing the variability is to reduce the amount of enthalpy, that is, the change of the modulation rate after the generation of the current shown in Fig. u(4) increases with time; the modulation rate after the generation of the overcurrent shown in Fig. i(b) When the modulation rate is limited to the maximum limit value and is shifted up and down; and the modulation rate after the overcurrent is generated as shown in FIG. 6(c) is less than the maximum limit value of the modulation rate. , to determine whether the reduced modulation rate is above a predetermined lower limit ( S142) Then, when the reduced modulation rate is above the preset lower limit value (S 142 : Yes), the modulation rate control process ends, and when the reduced modulation rate is less than the preset lower limit In the case of the value (S142 ··N〇), the modulation rate is set to the lower limit value as shown in the figure (S143), and the modulation rate 栌 process is completed. The process is in the modulation rate control process (S104). After the end, the load interrupt processing ends, and the next load interrupt processing is executed. ... ' 130030.doc •25- 200843323 Again, as shown in Figure 9, the person is a field; Therefore, in the case of the reverse bursting, the lightning is turned into/out (Sl〇l: Yes) ^ 'When the 唬 is concealed, Dan starts to output to the inverter circuit 2 (S105). Therefore, when passing the time, the output of the P-phase circuit 20 is blocked (the previous negative 唬 - from the "Shu 〇 〇 山 山 山 山 山 山 山 山 山 山 山 直至 直至 直至 直至 直至 直至 直至 直至 直至 直至 直至 直至 直至 直至 直至 直至 直至 直至 直至 直至 直至 直至 直至 直至 直至 直至At the time until the time point in the load interruption processing, the signal is output to the ?1 DC motor 3. The re-starting transmission is determined by the above-mentioned modulation rate control processing. Thereafter, the processing in the load ends and the next load month 戟 τ _ processing is executed. Thereby, the fan motor control device 100 of the second embodiment is controlled. [Features of the present fan motor control device 1] The fan motor control device 1 (8) of the present embodiment has a feature. In the fan motor control device 100 of the present embodiment, when an overcurrent flows in the brushless motor 3, the signal output to the brushless DC motor 3 is temporarily blocked, and then controlled to be compared with the overcurrent detection. The modulation rate with a small modulation rate starts to output 'HI', which suppresses the overcurrent generated in the brushless DC motor 3 after restarting the output. Thereby, the signal outputted to the brushless DC motor 3 after the restart of the output can be suppressed from being interrupted again, and the occurrence of the interruption and recovery of the signal outputted to the brushless DC motor 3 can be suppressed. As a result, abnormal sound can be suppressed due to the reverse of the interruption and recovery of the signal input to the brushless DC motor 3, and the power element can be protected. Further, in the case of the patent document 1, the current value of the flow to the fan motor is lowered to reduce the number of revolutions of the wind turbine 213030.doc -26-200843323, and the signal output to the fan motor is prevented from being blocked. The fan motor control unit HK) can operate the brushless DC motor 3 in accordance with the speed command to cause a problem that the operable area of the brushless DC motor 3 does not become narrow. Further, since it is necessary to provide an input current detecting circuit for measuring the current flowing in the brushless motor 3, only the input current detecting circuit can constitute the fan motor control unit 即可. Further, in the fan motor control device (9) of the present embodiment, even when an overcurrent is generated to the output of the brushless motor 3 at the modulation rate of the lower limit value, the current is in the case of no brush DC. An overcurrent is generated under the influence of the noise that does not interfere with the operation of the motor 3. Therefore, the lower limit value is used as the modulation rate (SU3), and the signal is further increased to the brushless DC motor (S10). Thereby, it is possible to prevent the operation of the fan motor from being stopped due to the trouble that the operation of the brushless dc motor 3 is not hindered. Further, the fan motor control device 100 of the present embodiment causes the current load to be interrupted when the output of the idler signal from the inverter circuit 20 is blocked (first = 8103 in the load interruption processing) At the time of the s(8) time of (4), the output of the brushless motor 3 is started immediately. As a result, even if the nickname output of the brushless dc motor 3 is blocked, the wind 2 that is rotated by the inertia can be immediately started to be output to the non-prison motor 3 in this manner. signal. The embodiments of the present invention have been described above with reference to the drawings, but it should be considered that the specific configuration is not limited to the embodiments. The invention is defined by the scope of the patent application, and not the above-described embodiments. The scope of the invention is intended to include all modifications within the meaning and scope of the invention. For example, in the above-described first embodiment, a certain time has elapsed since the signal output from the motor to the brushless DC motor is blocked (the time from when the output of the gate signal to the inverter circuit is blocked (previous load interruption) When the s4 guard in the process is "up to the time of S6 in the current load interruption processing", the brushless switch 1) is started (the motor output signal is used as an example.) The present invention is not limited to this, and as shown in the first embodiment of the present invention, as shown in FIG. 3, when the overcurrent detecting circuit does not detect an overcurrent, the signal can be output to the brushless DC motor again. Specifically, 'when the signal output is interrupted in the previous load interruption processing', as shown in Fig. 13, first, it is judged whether or not the brushless DC motor generates over-current ^ (S 2 01). The receiver 'when over-current detection When the circuit does not detect an overcurrent (S201: No), since the output is blocked (S202: Yes), the signal is output to the brushless DC motor (S203). The second implementation shown in Fig. 14 In the modified example of the form, the first embodiment is also In the same manner as the modification of the state, when the signal output is interrupted in the previous load interruption processing, first, it is judged whether or not an overcurrent has occurred in the brushless DC motor (S301). Then, when the overcurrent detecting circuit does not detect the overcurrent (S3 02 : No), since the signal output is interrupted (S3 〇 2 : Yes), the signal is output to the brushless DC motor (S303). In the first embodiment, the following case is taken as an example. Note, that is, when the modulation rate when the signal is to be output to the brushless DC motor is less than the preset lower limit (S54 ·· No), the maximum modulation limit value is 130030.doc -28- 200843323 Set to the lower limit value (S55), and start to output the signal to the brushless dc motor again. However, the present invention is not limited to this. The full shape example of the first embodiment shown in Fig. 15 is to be restarted. When the modulation rate when the DC motor output signal is applied is less than the preset lower limit value, the signal to the brushless DC motor can no longer be output.

Specifically, as shown in FIG. 15, the modulation rate maximum limit value is decreased by a specific amount to be updated (S53), whereby when the above-described modulation rate maximum limit value is less than the preset lower limit value (S54: No), an abnormality report (S455) is generated, thereby ending the operation. Further, in the modification of the second embodiment shown in Fig. 16, as in the modification of the first embodiment, the modulation factor is decreased by a fixed amount (S 14 1), whereby the modulation rate is When the lower limit value is not set in advance (S142 · No), an error report (S543) is generated to end the operation. In the first embodiment, when the modulation rate when the signal is to be output to the brushless DC motor is less than the preset lower limit value 054), the maximum modulation limit value is set to the lower limit value. The limit value (S55), but the present invention is not limited to the case where it is set to the lower limit value, and the modulation rate maximum limit value may be controlled so as not to be less than the lower limit value. The second embodiment is also the same. The modulation rate when the signal is output to the brushless DC motor is not full before the lower limit value (S142), and the modulation rate is set to the lower limit value (S143) 'But the present invention is not limited to If you set it to the lower limit, you can also control the modulation rate so that it does not fall below the lower limit. / [Industrial Applicability] With the present invention, it is possible to suppress the interruption of the signal output to the fan motor and to restore the 130030.doc -29- 200843323, thereby suppressing the occurrence of abnormal sound, components, and suppressing the fan. ^ The work area has been narrowed. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention. FIG. 2 is a flow chart for explaining a control method of a fan motor control device shown in FIG. Fan Motor Figure 3 is a flow chart for explaining the method of control of Figure 1. Fig. 4 is a flow chart for explaining the method of controlling the control of the fan motor shown in Fig. 1. Fig. 5 is a diagram showing the relationship between the output voltage waveform of the load timer, the DC current waveform of the X-ray, the DC current waveform of the reverse path, L仏, the relationship between the modulation rate limit and the load interruption processing. Figure. ^(4) to Fig. 6(4) are graphs showing the large value of the modulation rate output when the overcurrent detection is performed. : 7 is a graph showing the maximum value of the modulation rate output set during overcurrent detection. Fig. 8 is a block diagram showing a second embodiment of the present invention. The side of the evil fan motor control device is a flow chart for explaining the fan motor control method of the fan motor control device shown in Fig. 8. Fig. 1 is a flow chart for explaining the fan horse violation control method of the fan air detecting motor control device shown in Fig. 8. 130030.doc -30- 200843323

Fig. 11 (a) to Fig. 11 (c) are graphs showing the rate of overshoot. Fig. 12 shows a reduction in the amount of overcurrent detection. Fig. 13 is a diagram showing a third embodiment shown in Fig. 2.曰β, 土乳@, a flow chart of a modified example of the motor control device Jil feather motor control method. Fig. 14 is a flow chart showing a modification of the control method of the wind motor control device of the second embodiment shown in Fig. 9 . Fig. 15 is a flow chart showing a modification of the fan motor control method of the wind motor control device according to the third embodiment shown in Fig. 3. Fig. 16 is a flow chart showing a modification of the fan motor control method according to the second embodiment shown in Fig. 10. [Main component symbol description] 1,100 fan motor control device 2 fan 3 brushless DC motor 10 converter circuit 20 Inverter circuit 30, 130 microcomputer 31 position, speed detecting unit 32, 132 hanging control unit 33, 133 speed control unit 34 sine wave modulation unit 35 driving ## generating unit 40 overcurrent detecting circuit 130030.doc-31 - Wind set

Claims (1)

200843323 X. Patent application scope: 1. A fan motor control device (1〇〇), characterized in that: a control mechanism (130) for controlling a signal for driving a fan motor (7); and a self-checking mechanism for a private machine ( 4)), detecting that the current value flowing to the fan motor has reached a certain value or more; and detecting, by the overcurrent detecting means, that the fan motor is over-powered (10), and the control mechanism interrupts the output to the fan motor. The signal sergeant controls the modulation rate of the signal outputted to the fan motor to be smaller than the overshoot 々 "the modulation rate is small, and then starts to output a signal to the fan motor. 2. The fan motor of claim 1 The control device (100), wherein the control mechanism ((10)) no longer starts outputting a signal to the fan motor when the modulation rate when the signal is output to the fan motor is less than the minimum modulation rate of the pre-sigh. 3. The fan motor control device (100) of claim 1, wherein the modulation rate when the signal is output to the fan motor is less than a small change in the pre-sigh At the time of the rate, the control means (1) causes the modulation rate of the signal output to the fan motor not to be less than the minimum modulation rate and restarts the output of the signal to the fan motor. A fan motor control device (1 (9)) according to any one of the members, wherein the control mechanism (130) starts at the specific time when the signal is output from the interrupting output to the fan motor = (4) Motor output signal. A fan motor control device (manufacturing device) according to any one of the items 1 to 3, wherein the control unit (U0) interrupts the signal output to the fan motor When the detecting mechanism does not detect the a current, it starts to output a signal to the fan motor. 6. A fan motor control device (1)' is characterized by: a control mechanism (30) 'which controls a signal for driving the fan motor (7); and an overcurrent detecting mechanism (4A) for detecting flow to the fan motor The current value has reached a certain value or more; and after the overcurrent detecting means detects that the fan motor is over-empty (10), the control unit P Μ interrupts the signal output to the fan motor, and outputs the signal to the fan motor. The modulation rate of the signal is limited to the modulation rate of the following conditions: a range smaller than the modulation rate during the overcurrent detection, and the signal is further output to the fan motor. A fan motor control device (1) according to claim 6, wherein said control means (30) relaxes said condition relating to a modulation rate of a signal outputted to said fan motor after restarting outputting a signal to said fan motor. 8. The fan motor control device (1) of claim 7, wherein the control mechanism (30) passes through a state in which the output of the signal to the fan motor is resumed, and the overcurrent is not detected. 1Special cusp of the day, to alleviate the above conditions related to the modulation rate of the signal output to the fan motor. 9. The fan motor control device (1) of claim 6, wherein 130030.doc 200843323 is intended to start the output of the fan motor wheel in advance #~ η $, the modulation rate is not full.疋 隶 隶 隶 隶 隶 隶 隶 隶 隶 隶 隶 隶 隶 隶 隶 隶 隶 隶 隶 隶 隶 隶 隶 隶 隶 隶 隶 隶 隶 隶 隶 隶 隶1〇· Shiming seeks 6 fan motor control device (1), in which when you want to start to the fan motor wheel in advance, the modulating rate is not full. When the variability is up to the above wind, the mechanism (30) is controlled so that the output is less and less than the minimum modulation rate, and the signal is output to the fan motor by 11 ^ 5 °. In the case of any of the items 6 to 10, the fan motor control device (1) of the member, wherein the control mechanism (3) passes through 4 points from the interruption of the transmission to the fan motor. The second intermediate port starts to output a signal to the fan motor. 12. The fan motor control device (1) of any one of claims 6 to 10, wherein the control mechanism (10) is interrupted and outputted to the fan motor. When the overcurrent detecting means does not detect an overcurrent, the signal is output to the fan motor. 13. A fan motor control method, 1 is characterized in that it controls the signal output to the fan motor, and Overcurrent flows to the above wind end $, # ^ ^ 4 When the paper is a motor, after the signal output to the upper motor is blocked, the modulation rate of the signal output to the fan, the ten, the π reed $$ to the fan motor is controlled to be more than the overcurrent detection. The rate is small, and then start to output signals to the above fan motor. 14 · A fan motor control method, 1 /, special policy lies in its control output to the fan motor signal, and 130030.doc 200843323 when I>. ^ W k to the above fan motor, the output is blocked to the above wind: ',,, after the signal is reached', the modulation rate of the signal output to the fan motor is limited to m. The modulation rate of the following conditions: overcurrent Detecting the range below the time-varying rate and starting to output the signal to the above fan motor 130030.doc