CN205544975U - Power supply unit and for welding power supply unit - Google Patents
Power supply unit and for welding power supply unit Download PDFInfo
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- CN205544975U CN205544975U CN201520834351.2U CN201520834351U CN205544975U CN 205544975 U CN205544975 U CN 205544975U CN 201520834351 U CN201520834351 U CN 201520834351U CN 205544975 U CN205544975 U CN 205544975U
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- utilization rate
- correction factor
- electric current
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Abstract
The utility model provides a power supply unit and for welding power supply unit restraines efficiency and reduces. Output current's (Iw) during control circuit (31) calculate during the measurement all the time square average value. Control circuit (31) obtain ambient temperature based on the temperature detection of signal (Td) from temperature sensor (28) output. In addition, control circuit (31) obtain the rotation rate of cooling fan (27) based on following the rotatory detected signal (Fv) that turn sensitive device (27a) exported. Rate of utilization benchmark value is calculated based on the correction factor who corresponds with ambient temperature and rotation rate in control circuit (31). And the comparison is carried out to average value and rate of utilization benchmark value in control circuit (31), comes control inverter circuit (22) according to the comparative result to output perhaps stops output current (Iw).
Description
Technical field
This utility model relates to a kind of supply unit and power source device for welding.
Background technology
Supply unit for such as arc welding machine be prescribed output-current rating value, specified utilization rate (for example, referring to
Patent documentation 1,2).The device that controls of supply unit limits use (the output electric current, right of supply unit based on specified utilization rate
Electric current carries out the period exported).Thus, the reduction etc. of the durability caused the heating due to transistor, transformator etc. is entered
Row suppression.
Citation
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2013-146735 publication
Patent documentation 2: Japanese Unexamined Patent Publication 11-259149 publication
Utility model content
The problem that utility model is to be solved
But, the temperature of the transistor etc. being included in supply unit is according to use state (such as, the crystal of supply unit
The state of cooling of pipe etc.) and change.But, if as described above, according to specified utilization rate, the period of output electric current is carried out
Limit, then there is the situation that the process of welding etc. is interrupted.The interruption of this process causes the increase in man-hour, makes production efficiency drop
Low.
This utility model is made to solve above-mentioned problem, it is intended that suppression efficiency reduces.
Solve the means of problem
The supply unit solving above-mentioned problem has: power circuit, and output electric current is exported by it；Current detecting electricity
Road, it detects described output electric current；Temperature sensor, the temperature of the surrounding of device is detected by it；And control circuit, its control
Making described power circuit, described control circuit is based on the corresponding with the environment temperature detected by described temperature sensing circuit the 1st
Correction factor, sets utilization rate reference value, to measure during in output electric current square meansigma methods calculate, to institute
State utilization rate reference value mutually to compare with described meansigma methods, and based on comparative result, be described use in described meansigma methods
Time more than rate benchmark, described output electric current is made to stop.
According to this structure, according to the environment temperature detected by temperature sensor, utilization rate reference value is adjusted.Further, by
According to utilization rate reference value and output electric current square the comparative result of meansigma methods, output electric current is controlled, therefore based on
The efficiency of the operation of output electric current reduces suppressed.
The most above-mentioned supply unit has: cooling fan, it cools down in device；And turn-sensitive device, it is right
The rotation of described cooling fan detects, and described control circuit is according to the described cooling wind detected by described turn-sensitive device
The rotary speed of fan and described environment temperature, set described 1st correction factor, and set based on described 1st correction factor
Described utilization rate reference value.
According to this structure, according to the environment temperature detected by temperature sensor and the cooling that device inside is cooled down
The rotary speed of fan, utilization rate reference value is adjusted.Further, due to according to utilization rate reference value with output electric current square
The comparative result of meansigma methods, output electric current is controlled, and therefore the efficiency of operation based on output electric current reduces suppressed.
The supply unit solving above-mentioned problem has: power circuit, and output electric current is exported by it；Current detecting electricity
Road, it detects described output electric current；Cooling fan, it cools down in device；Turn-sensitive device, it is to described cooling fan
Rotation detect；And control circuit, it controls described power circuit, described control circuit based on by described rotation sensing
The 1st correction factor that the rotary speed of the described cooling fan that device detects is corresponding, sets utilization rate reference value, to the phase of measurement
Output electric current between square meansigma methods calculate, to described utilization rate reference value and described meansigma methods mutually than
Relatively, and based on comparative result, when described meansigma methods is more than described utilization rate benchmark, described output electric current is made to stop.
According to this structure, according to the rotary speed of the cooling fan that device inside is cooled down, utilization rate reference value quilt
Adjust.Further, due to according to utilization rate reference value and output electric current square the comparative result of meansigma methods, output electric current is controlled
System, therefore the efficiency of operation based on output electric current reduces suppressed.
In above-mentioned supply unit, the 2nd correction factor is added by the most described control circuit with described 1st correction factor
Set and allow correction factor, and by output-current rating square be multiplied by specified utilization rate and described allow correction factor and
The value obtained is set to described utilization rate reference value, and wherein, the 2nd correction factor is set to make described utilization rate reference value become
The value bigger than the value that square being multiplied by described specified utilization rate of described output-current rating is obtained.
According to this structure, according to the environment temperature detected by temperature sensor, cooling wind that device inside is cooled down
The rotary speed of fan, the 2nd correction factor, utilization rate reference value is adjusted.2nd correction factor makes utilization rate reference value ratio based on volume
Surely the reference value of output electric current Ie and specified utilization rate α is bigger.Further, flat due to according to utilization rate reference value and output electric current
The comparative result of the meansigma methods of side, output electric current is controlled, therefore compared with in the specified lower situation controlling output electric current, based on
The efficiency of the operation of output electric current reduces suppressed.
Additionally, the power source device for welding solving above-mentioned problem uses above-mentioned supply unit, it is configured to generate welding
The output electric current that object is processed.
According to this structure, the efficiency in the processing of welding object is reduced and is suppressed.
Utility model effect
According to this utility model, it is possible to suppression efficiency reduces.
Accompanying drawing explanation
Fig. 1 is the frame circuit diagram of arc welding machine.
Fig. 2 is the performance plot representing output electric current with an example of the relation of utilization rate.
Fig. 3 is the performance plot representing environment temperature with an example of the relation of correction factor.
Fig. 4 is the explanatory diagram representing environment temperature with an example of the relation of correction factor.
Fig. 5 is the performance plot representing rotary speed with an example of the relation of correction factor.
Fig. 6 is the explanatory diagram representing rotary speed with an example of the relation of correction factor.
Fig. 7 is the performance plot of the environment temperature representing another example and the relation of correction factor.
Symbol description:
11 supply units
20 power circuits
26 current detection circuits
27 cooling fans
27a turn-sensitive device
28 temperature sensors
31 control circuits
M welding object
Iw exports electric current
Ie output-current rating
The specified utilization rate of α
UA utilization rate reference value
N (T, V) correction factor (the 1st correction factor)
nT(T) correction factor (the 1st correction factor)
nV(V) correction factor (the 1st correction factor)
β allows correction factor (the 2nd correction factor)
Si meansigma methods
T ambient temperature (environment temperature)
V rotary speed
Detailed description of the invention
Below, an embodiment is illustrated.
As it is shown in figure 1, arc welding machine 10 has welding supply (hereinafter referred to as supply unit) 11.Supply unit
Positive output terminal 11p of 11 is connected with welding torch 12, and the negative output terminal 11m of supply unit 11 is connected with welding object (mother metal) M.
The AC input power of the three-phase (U phase, V phase, W phase) provided from source power supply is converted to corresponding to setting value by supply unit 11
DC output power.This DC output power is being held between the electrode of welding torch 12 (such as welding wire) and welding object M
Produce electric arc.By the electric arc so produced, welding object M is processed.
The rectification circuit 21 for example, diode bridge circuit of supply unit 11.AC input power is turned by rectification circuit 21
It is changed to direct current power.Inverter circuit 22 has the bridge circuit employing multiple (such as 4) switch element TR.Switch element
TR for example, insulated gate bipolar transistor (IGBT:Insulated Gate Bipolar Transistor).Inverter circuit
The DC output power of rectification circuit 21 is converted to the alternating electromotive force of high frequency by 22.
Transformator 23 for example, has the transformator of primary coil and secondary coil.Transformator 23 is by inverter circuit 22
Produced alternating electromotive force is converted to coil than corresponding voltage.The output voltage of transformator 23 is converted to by rectification circuit 24
DC output power.Rectification circuit 24 is connected with positive output terminal 11p and negative output terminal 11m.The direct current of rectification circuit 24 is defeated
Go out electric power and be provided to welding torch 12.
Inverter circuit 22, transformator 23, rectification circuit 24 are comprised in the power circuit 20 of supply unit 11.It addition,
Power circuit 20 can also comprise rectification circuit 21.
Voltage detecting circuit 25 detects voltage (output voltage) Vw between lead-out terminal, and exports and this output voltage Vw
Corresponding voltage detection signal Vd.Current detection circuit 26 detection output electric current Iw, and export corresponding with this output electric current Iw
Current detection signal Id.Control circuit 31, based on voltage detection signal Vd and current detection signal Id, exports control signal Ic.
The switch element TR being included in inverter circuit 22 carrys out on-off based on control signal Ic.Control circuit 31 is based on controlling letter
Number Ic, is controlled during the connection to switch element TR.Therefore, inverter circuit 22 generates corresponding with control signal Ic
Alternating electromotive force.
Supply unit 11 is provided with cooling fan 27.Control circuit 31 carrys out on-off cooling wind according to control signal Fc
Fan 27.The air-supply of the cooling fan 27 by having connected, inverter circuit 22 grade within supply unit 11 is cooled.
Cooling fan 27 is provided with turn-sensitive device 27a.The rotary speed of turn-sensitive device 27a detection cooling fan 27
(rotating speed), and export and this rotary speed (rotating speed) corresponding rotation detection signal Fv.
Supply unit 11 is provided with temperature sensor 28.Temperature sensor 28 uses such as critesistor
(thermistor) etc..Temperature sensor 28 is provided near the assigned position in supply unit 11, such as cooling fan 27
Framework peristome (such as air taking mouth).Temperature sensor 28 output is examined with environment temperature (ambient temperature) corresponding temperature
Survey signal Td.
Control circuit 31 based on current detection signal Id, temperature detection signal Td, rotation detection signal Fv, export or
Stop output electric current Iw.
In the memorizer 31a of control circuit 31, output-current rating Ie (A), specified utilization rate α (%) are set.
Fig. 2 represents an example of output electric current-utilization rate characteristic.In fig. 2, characteristic curve L1 shown in solid represents
Supply unit 11 specified under output electric current-utilization rate characteristic.
In supply unit 11, output-current rating Ie, specified utilization rate α are set.Such as, output-current rating Ie is
400 (A), specified utilization rate α is 25 (%).In this case, setting value and the output-current rating Ie of output electric current Iw are made
In the case of equal, needing with 10 minutes was 1 cycle, carries out welding based on output electric current Iw (=400) and amounts to 2.5 minutes,
Within remaining 7.5 minutes, welding is made to stop.If the setting value of output electric current Iw is set to 270 (A), then allow that utilization rate is (specified
Output electric current/output setting value)2× specified utilization rate=(400/270)2× 25=55 (%).If it addition, making output electric current Iw
Setting value be 200 (A), then allow that utilization rate is 100 (%), it is possible to weld continuously.
Additionally, in the memorizer 31a of control circuit 31, allow that correction factor β is set.
Control circuit 31 detects temperature (ambient temperature) T of the surrounding of supply unit 11 based on temperature detection signal Td.
Additionally, control circuit 31 is based on rotation detection signal Fv, detect rotary speed V of cooling fan 27.Further, control circuit 31
Based on allowing that correction factor β, output-current rating Ie, specified utilization rate α, ambient temperature T, rotary speed V calculate utilization rate
Reference value UA.
Such as, control circuit 31 calculates utilization rate reference value UA based on equation below.
UA=(Ie)2× α × (β+n (T, V)) ... [1]
Here, allow that correction factor β is in the range of the reduction of the scaling loss and durability that do not produce the source of welding current, make
Can temporarily exceed the coefficient of utilization rate.This allows that correction factor β is set to value (such as, 1.03～1.1 left side bigger than " 1 "
Right).
Correction factor n (T, V) is
Number.The use state of supply unit 11 comprises: use the temperature of environment of supply unit 11, the operating state of supply unit 11.
Operating state for example, the parts being included in supply unit 11 are cooled down cooling fan 27 state (rotary speed,
Rotating speed).Control circuit 31, based on temperature detection signal Td and rotation detection signal Fv, obtains correction factor n (T, V).
Here, control based on output-current rating Ie and specified utilization rate α is illustrated.
Such as, reference value alpha 0 is set based on characteristic curve L1 shown in solid in Fig. 2.This reference value alpha 0 is based on specified
Output electric current Ie and specified utilization rate α, and utilize
α 0=(Ie)2×α …[2]
And obtain.It is to say, reference value alpha 0 be set to output-current rating Ie square with specified utilization rate α phase
The value of the result taken advantage of.Further, the output electric current Iw in measuring period Tk (10 minutes) square meansigma methods Si exceed this base
During quasi-value α 0, stop output electric current Iw.
Consider or not the situation of correction factor n (T, V) in above-mentioned formula [1], say, that, it is considered to by correction factor
N (T, V) is set to the situation of " 0 ".Reference value now is set to α 1.This reference value alpha 1 is that above-mentioned reference value alpha 0 is applied appearance
Permitted the value of correction factor β.Further, this reference value alpha 1 is bigger than reference value alpha 0.
In fig. 2, characteristic curve L2 represents by allowing that the characteristic curve L1 of supply unit 11 is carried out by correction factor β
Revised output electric current-utilization rate characteristic.It is to say, allow that correction factor β is to more than according only to output-current rating
Ie and specified utilization rate α and the reference value of reference value alpha 0 that sets are set.
Further, correction factor n (T, V) according to ambient temperature T and rotary speed V, to applied as described above allow repair
The reference value alpha 1 of positive coefficient β is modified.
To ambient temperature T and correction factor nT(T) example of relation illustrates.
As it is shown on figure 3, for the correction factor n of high ambient temperature TT(T) it is set to than repairing for low ambient temperature T
Positive coefficient nT(T) value is little.It addition, correction factor nT(T) it is set to, relative to ambient temperature T, change stepwise.
Such as, maximum (maximum temperature) T of temperature range supply unit 11 usedMAXWith minima (lowest temperature
Degree) TMINBetween be divided into the interval of specified quantity (in Fig. 3 being 8), use the correction factor n in each intervalT(T).It addition,
Interval quantity for ambient temperature T can be changed to be worth arbitrarily.
Such as, the maximum of T of temperature rangeMAXIt is 50 (DEG C), minima TMINFor-20 (DEG C).
Would indicate that the temperature (silicon carbide) on the border in interval is set to T1、T2、T3、T4、T5、T6、T7。
The correction factor n corresponding with each intervalT(T) memorizer 31a it is stored in.Control circuit 31 shown in Fig. 1 is from depositing
Reservoir 31a reads the correction factor n corresponding with ambient temperature TT(T)。
As shown in Figure 4, in ambient temperature T than minimum temperature TMINIn the case of low, correction factor be set with and send alarm
Value.The value sending alarm is the maximum (or minima) that the numerical value being saved is showed, for example, "-99 ".
It is minimum temperature T in ambient temperature TMINAbove, and less than silicon carbide T7In the case of, with minimum temperature TMIN
With silicon carbide T7Medium temperature (=(TMIN+T7)/2) corresponding value is as correction factor nT(T) it is stored in shown in Fig. 1
Memorizer 31a.
Similarly, it is silicon carbide T in ambient temperature T7Above, and less than silicon carbide T6In the case of, with interval temperature
Degree T7With silicon carbide T6Medium temperature (=(T6+T7)/2) corresponding value is as correction factor nT(T) it is stored in shown in Fig. 1
Memorizer 31a.
Further, it is silicon carbide T in ambient temperature T2Above, and be silicon carbide T1In the case of below, with interval temperature
Degree T2With silicon carbide T1Medium temperature (=(T1+T2)/2) corresponding value is as correction factor nT(T) it is stored in shown in Fig. 1
Memorizer 31a.Silicon carbide T1For example, under rated current, specified utilization rate, it is ensured that the use of supply unit 11 is
High-temperature.
In ambient temperature T than silicon carbide T1Greatly, and be maximum temperature TMAXIn the case of below, with silicon carbide TMAX
With silicon carbide T1Medium temperature (=(TMAX+T1)/2) corresponding value is as correction factor nT(T) it is stored in shown in Fig. 1
Memorizer 31a.
Further, in ambient temperature T than maximum temperature TMAXIn the case of height, with above-mentioned ratio minimum temperature TMINLow situation
Similarly, correction factor is set with sends the value of alarm.
Rotary speed V and correction factor n to cooling fan 27V(V) example of relation illustrates.
As it is shown in figure 5, for the correction factor n of low rotary speed VV(V) it is set to than repairing for high rotation speed V
Positive coefficient nV(V) value is little.It addition, correction factor nV(V) it is set to, relative to rotary speed V, change stepwise.
Such as, maximum (maximum speed) V of velocity interval supply unit 11 usedMAXWith minima (lowest speed
Degree) VMINBetween be divided into the interval of specified quantity (in Fig. 3 being 8), use the correction factor n in each intervalV(V).It addition,
Interval quantity for rotary speed V can be changed to be worth arbitrarily.
Would indicate that the speed (overall travel speed) on the border in interval is set to V1、V2、V3、V4、V5、V6、V7。
The correction factor n corresponding with each intervalV(V) memorizer 31a it is stored in.Control circuit 31 shown in Fig. 1 is from depositing
Reservoir 31a reads the correction factor n corresponding with rotary speed VV(V)。
As shown in Figure 6, in rotary speed V than minimum speed VMINIn the case of low, correction factor be set with and send alarm
Value.The value sending alarm is the maximum (or minima) that the numerical value being saved is showed, for example, "-99 ".
It is minimum speed V in rotary speed VMINAbove, and less than overall travel speed V7In the case of, with minimum speed VMIN
With overall travel speed V7Midrange speed (=(VMIN+V7)/2) corresponding value is as correction factor nV(V) it is stored in shown in Fig. 1
Memorizer 31a.
Similarly, it is overall travel speed V in rotary speed V7Above, and less than overall travel speed V6In the case of, with interval speed
Degree V7With overall travel speed V6Midrange speed (=(V6+V7)/2) corresponding value is as correction factor nV(V) it is stored in shown in Fig. 1
Memorizer 31a.
Further, it is overall travel speed V in rotary speed V2Above, and be overall travel speed V1In the case of below, with interval speed
Degree V2With overall travel speed V1Midrange speed (=(V1+V2)/2) corresponding value is as correction factor nV(V) it is stored in shown in Fig. 1
Memorizer 31a.Overall travel speed V1The for example, rotary speed of the standard of cooling fan 27.Cooling fan 27 is at each product
In, rotating speed has difference.The median of the scope of the difference of the rotary speed of standard for example, rotary speed.
In rotary speed V than overall travel speed V1Greatly, and be maximum speed VMAXIn the case of below, with overall travel speed VMAX
With overall travel speed V1Midrange speed (=(VMAX+V1)/2) corresponding value is as correction factor nV(V), it is stored in shown in Fig. 1
Memorizer 31a.
Control circuit 31 shown in Fig. 1 is based on the correction factor n for ambient temperature TT(T) with for rotary speed V
Correction factor nV(V), correction factor n (T, V) is calculated.Such as, control circuit 31 passes through equation below,
N (T, V)=nT(T)+nV(V) …[3]
Calculate correction factor n (T, V).
Control circuit 31 based on
Si=(1/Tk) × ∫ (Iw)2dt …[4]
Come output electric current Iw in the measurement period Tk of computational rules square meansigma methods Si.It addition, at the source of welding current
In the case of, measurement period Tk is 10 (minutes) (=600 seconds).
It addition, control circuit 31 is with the sampling period Ts (second) of regulation, output electric current Iw is sampled, to sampling result
Simulation/digital conversion (A/D conversion), obtains exporting digital value Id (m) of electric current.So, above-mentioned meansigma methods Si according to
Si (m)=(D (m-k-1)+...+D (m))/k ... [5]
And obtain.Wherein, D (m)=Id (m)2, k is the number obtained by sampling in measuring period Tk (10 minutes)
The number of word value, k=Tk/Ts.By this formula, control circuit 31 is measured the output electric current Iw's in period Tk (10 minutes)
Square meansigma methods Si.Then, control circuit 31 continues to implement sampling, and calculates meansigma methods Si at each sampling period Ts.
Sampling period Ts is such as set to 1 second.Such as, current detection circuit 26 is by low pass filter (cut-off frequency
It is 1～about 10Hz) detect output electric current Iw.Output electric current Iw is smoothed by this low pass filter.Thus, electricity is controlled
Road 31 obtains meansigma methods Si corresponding with output electric current Iw.Alternatively, it is also possible to low pass filter to be arranged on control circuit 31.
It addition, by the setting of short sampling period Ts (such as, 100 μ s), obtain corresponding with the change of output electric current
Digital value.This setting needs to keep the memorizer of huge data (k=6,000,000), the calculation process of high speed, causes into
This rising.
Meansigma methods Si is compared by control circuit 31 with utilization rate reference value UA.Then, control circuit 31 based on comparative result,
Export or stop exporting electric current Iw.Such as, in the case of (Si ＜ UA) that meansigma methods Si is less than utilization rate reference value UA, control
Circuit 31 processed continues to put out output electric current Iw.Further, in the situation that meansigma methods Si is more than utilization rate reference value UA (Si >=UA)
Under, control circuit 31 stops output electric current Iw.
It follows that the effect to above-mentioned supply unit 11 illustrates.
The control circuit 31 of supply unit 11, based on temperature detection signal Td, carrys out computing environment temperature T all the time.This
Outward, control circuit 31, based on rotation detection signal Fv, all the time to calculate rotary speed V of cooling fan 27.Further, control
Circuit 31 processed based on output-current rating Ie, specified utilization rate α, allow correction factor β, ambient temperature T, rotary speed V, come every
Time calculate utilization rate reference value UA with often carving.
Additionally, control circuit 31 to output electric current Iw square meansigma methods Si calculate.Such as, as it has been described above, press
Each sampling period Ts, is sampled output electric current Iw, obtains digital value Id.Further, by above-mentioned formula [5], calculate
Meansigma methods Si.
Further, meansigma methods Si is compared by control circuit 31 with utilization rate reference value UA.Control circuit 31 is according to comparing
Result exports control signal Ic to inverter circuit 22.
Such as, in the case of meansigma methods Si is less than utilization rate reference value UA, control circuit 31 exports control signal Ic, with
The switch element TR of on-off inverter circuit 22.Thus, inverter circuit 22 output and the on-off of switch element TR
Corresponding alternating electromotive force.Based on this alternating electromotive force, output electric current Iw is output.
On the other hand, if meansigma methods Si reaches utilization rate reference value UA, or meansigma methods Si exceedes utilization rate reference value UA,
Then control circuit 31 is according to control signal Ic, stops the on-off of the switch element TR of inverter circuit 22.Thus, output electricity
Stream Iw is stopped.
Above-mentioned utilization rate reference value UA changes according to ambient temperature T, rotary speed V.
Such as, if ambient temperature T rises, then control circuit 31 reduces utilization rate reference value UA according to this ambient temperature T.
It is to say, make the characteristic curve L2 shown in Fig. 2 move up in the side shown in arrow A1.In this case, output electric current Iw
In utilization rate diminish.Control circuit 31 comparative result based on utilization rate reference value UA Yu meansigma methods Si, stops output electric current
Iw.Thus, when the high temperature that ambient temperature T rises, the period exporting output electric current Iw is limited, in supply unit 11
Inverter circuit 22, the situation of the temperature of transformator 23 etc. the temperature (allowable temperature) that exceedes regulation is suppressed.
On the other hand, if ambient temperature T reduces, then control circuit 31 increases utilization rate benchmark according to this ambient temperature T
Value UA.It is to say, make the characteristic curve L2 shown in Fig. 2 move up in the side shown in arrow A2.In this case, output electricity
Utilization rate in stream Iw becomes big.Control circuit 31 comparative result based on utilization rate reference value UA Yu meansigma methods Si, stops output
Electric current Iw.Thus, when the low temperature that ambient temperature T reduces, the period exporting output electric current Iw is elongated.It is to say,
The time of process (welding) based on output electric current Iw is elongated.Therefore, operation is difficult to be interrupted, and the reduction of operating efficiency is pressed down
System.
Rotary speed V is different according to individual variation for cooling fan 27.Additionally, cooling fan 27 exists due to aging and lead
Cause the situation that rotary speed V reduces.Thus, in the cooling fan 27 that rotary speed V is low, the internal temperature of supply unit 11 becomes
High.Control circuit 31 reduces utilization rate reference value UA according to rotary speed V of cooling fan 27.It is to say, make shown in Fig. 2
Characteristic curve L2 move up in the side shown in arrow A1.Thus, the period exporting output electric current Iw shortens, power supply
The temperature of inverter circuit 22 in device 11, transformator 23 etc. exceedes the situation of the temperature (allowable temperature) of regulation and is suppressed.
On the other hand, in the case of the rotary speed V height of cooling fan 27, the internal temperature step-down of supply unit 11.
Control circuit 31 increases utilization rate reference value UA according to rotary speed V of cooling fan 27.It is to say, make shown in Fig. 2
Characteristic curve L2 moves up in the side shown in arrow A2.Thus, the period exported output electric current Iw is elongated.Namely
Saying, the time of process (welding) based on output electric current Iw is elongated.Therefore, operation is difficult to be interrupted, the reduction quilt of operating efficiency
Suppression.
As previously discussed, according to present embodiment, following effect is played.
(1) the output electric current Iw in control circuit 31 computation and measurement period Tk all the time square meansigma methods Si.
Control circuit 31 obtains ambient temperature T based on the temperature detection signal Td exported from temperature sensor 28.Additionally, control circuit
31, based on the rotation detection signal Fv exported from turn-sensitive device 27a, obtain cooling down rotary speed V of fan 27.Control circuit
31 based on the correction factor n (T, V) corresponding with ambient temperature T and rotary speed V, calculates utilization rate reference value UA.Further, control
Meansigma methods Si is compared by circuit 31 with utilization rate reference value UA, controls inverter circuit 22 according to comparative result, and defeated
Go out or stop exporting electric current Iw.So, by using and ambient temperature T and corresponding the making of rotary speed V of cooling fan 27
By rate reference value UA, control to export electric current with according to specified (output-current rating Ie, specified utilization rate α) of supply unit 11
The situation of Iw is compared, it is possible to the reduction of suppression operating efficiency.
(2) utilization rate reference value UA corresponding with rotary speed V of ambient temperature T and cooling fan 27 is used.Thus, example
As, in the case of ambient temperature T rises, by reducing utilization rate reference value UA such that it is able to shorten and output electric current Iw is entered
The period of row output, and suppress the temperature of the inverter circuit 22 in supply unit 11, transformator 23 etc. to exceed the temperature of regulation
The situation of (allowable temperature).Additionally, in the case of rotary speed V of cooling fan 27 is low, by reducing utilization rate reference value
UA such that it is able to shorten the period that output electric current Iw is exported, and suppress the inverter circuit 22 in supply unit 11, become
The temperature of depressor 23 grade exceedes the situation of the temperature (allowable temperature) of regulation.
It addition, the respective embodiments described above can also be implemented by the way of following.
Although in the above-described embodiment, using correction factor n (T, V) based on ambient temperature T with rotary speed V to come
Calculate utilization rate reference value UA but it also may any one party based on ambient temperature T Yu rotary speed V calculates utilization rate benchmark
Value UA.Such as, the correction factor n proportional to ambient temperature T is usedT(T).In this case, the control circuit 31 shown in Fig. 1
Pass through
UA=(Ie)2×α×(β+nT(T)) …[6]
Calculate utilization rate reference value UA.
This utilization rate reference value UA is used for the supply unit etc. not possessing cooling fan.At this supply unit
In, also in the same manner as above-mentioned embodiment, it is possible to suppression efficiency reduces, reliability reduces.
Additionally, to ambient temperature T it is equally possible that use the correction factor n proportional relative to rotary speed VV
(V).In this case, control circuit 31 is passed through
UA=(Ie)2×α×(β+nV(V)) …[7]
Calculate utilization rate reference value UA.In the supply unit employing this utilization rate reference value UA, also function to
The effect that above-mentioned embodiment is same.
Although in the above-described embodiment, employing and set stepwise relative to ambient temperature T and rotary speed V
Correction factor but it also may use the correction factor set by other method.
Such as, as shown in Figure 7, it is also possible to use the correction factor n for ambient temperature TT(T) utilization rate benchmark is calculated
Value UA.This correction factor nT(T) can by such as based on ambient temperature T to correction factor nT(T) arithmetic expression calculated is carried out
(such as, linear function) and obtain.Control circuit 31 shown in Fig. 1 calculates the correction for ambient temperature T according to arithmetic expression
Coefficient nT(T)。
Although it addition, eliminate accompanying drawing, but rotary speed V for cooling fan 27 is also same.It is to say, control
Circuit 31 processed uses arithmetic expression (such as, linear function), calculates correction factor n based on rotary speed VV(V).Further, control
Circuit 31, according to above-mentioned formula [1], calculates utilization rate reference value UA.
In the supply unit applying these utilization rate reference values UA, also in the same manner as above-mentioned embodiment, it is possible to press down
Efficiency processed reduces.Furthermore it is possible to suppression reliability reduces.
Claims (6)
1. a supply unit, it is characterised in that have:
Power circuit, output electric current is exported by it；
Current detection circuit, it detects described output electric current；
Temperature sensor, the temperature of the surrounding of device is detected by it；With
Control circuit, it controls described power circuit,
Described control circuit, based on 1st correction factor corresponding with the environment temperature detected by described temperature sensor, sets
Determine utilization rate reference value, to measure during in output electric current square meansigma methods calculate, to described utilization rate benchmark
Value mutually compares with described meansigma methods, and based on comparative result, when described meansigma methods is more than described utilization rate benchmark,
Control described power circuit so that described output electric current stops.
Supply unit the most according to claim 1, it is characterised in that
Have:
Cooling fan, it cools down in device；With
Turn-sensitive device, the rotation of described cooling fan detects by it,
Described control circuit according to the rotary speed of the described cooling fan detected by described turn-sensitive device and described around
Temperature, sets described 1st correction factor, and according to described 1st correction factor, sets described utilization rate reference value.
Supply unit the most according to claim 1 and 2, it is characterised in that
Described control circuit is implemented to control to allow correction system to be set with described 1st correction factor phase Calais by the 2nd correction factor
Number, and by output-current rating square be multiplied by specified utilization rate and the described value allowing correction factor and obtain is set to described
Utilization rate reference value, wherein, the 2nd correction factor is set to make described utilization rate reference value become specified output described in comparison
Electric current square be multiplied by described specified utilization rate and the bigger value of the value that obtains.
4. a supply unit, it is characterised in that have:
Power circuit, output electric current is exported by it；
Current detection circuit, it detects described output electric current；
Cooling fan, it cools down in device；
Turn-sensitive device, the rotation of described cooling fan is detected by it；With
Control circuit, it controls described power circuit,
Described control circuit is based on the corresponding with the rotary speed of the described cooling fan detected by described turn-sensitive device the 1st
Correction factor, sets utilization rate reference value, to measure during in output electric current square meansigma methods calculate, to institute
State utilization rate reference value mutually to compare with described meansigma methods, and based on comparative result, be described use in described meansigma methods
Time more than rate benchmark, control described power circuit so that described output electric current stops.
Supply unit the most according to claim 4, it is characterised in that
Described control circuit is implemented to control to allow correction system to be set with described 1st correction factor phase Calais by the 2nd correction factor
Number, and by output-current rating square be multiplied by specified utilization rate and the described value allowing correction factor and obtain is set to described
Utilization rate reference value, wherein, the 2nd correction factor is set to make described utilization rate reference value become specified output described in comparison
Electric current square be multiplied by described specified utilization rate and the bigger value of the value that obtains.
6. a power source device for welding, it is characterised in that
Supply unit described in any one of Claims 1 to 5 is configured to generate the output electricity being processed welding object
Stream.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-018444 | 2015-02-02 | ||
| JP2015018444A JP6498458B2 (en) | 2015-02-02 | 2015-02-02 | Power supply device and power supply device for welding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205544975U true CN205544975U (en) | 2016-08-31 |
Family
ID=56569242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520834351.2U Expired - Fee Related CN205544975U (en) | 2015-02-02 | 2015-10-26 | Power supply unit and for welding power supply unit |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6498458B2 (en) |
| CN (1) | CN205544975U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6688369B1 (en) | 2018-11-15 | 2020-04-28 | 電元社トーア株式会社 | Resistance welding machine controller |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11254150A (en) * | 1998-03-10 | 1999-09-21 | Na Dekkusu:Kk | Resistance welding equipment |
| JP2013151012A (en) * | 2012-01-26 | 2013-08-08 | Daihen Corp | Protection control method for welding power source |
| JP2013184193A (en) * | 2012-03-08 | 2013-09-19 | Daihen Corp | Protection control method for welding source |
-
2015
- 2015-02-02 JP JP2015018444A patent/JP6498458B2/en active Active
- 2015-10-26 CN CN201520834351.2U patent/CN205544975U/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP6498458B2 (en) | 2019-04-10 |
| JP2016140886A (en) | 2016-08-08 |
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Granted publication date: 20160831 Termination date: 20181026 |