JP5602605B2 - Power supply device for electric hoisting and traversing device - Google Patents

Description

  The present invention relates to a power supply device for an electric hoisting and traversing device such as an electric chain block and an electric hoist, and in particular, after turning on the power, the hoisting operation and the traversing operation can be performed directly without waiting for the initial charging of the power storage device, Regenerative power generated during regeneration of the traverse motor can be efficiently stored in an electric storage device made up of an electric double layer capacitor, a lithium ion capacitor, etc., and the stored electric power can be supplied to the elevator motor and traverse motor during power running The present invention relates to an energy saving type electric hoist traverse device power supply device.

  In recent years, there has been a strong demand for energy saving in all industrial fields from the viewpoint of preventing global warming. In power supply devices for electric hoisting and traversing devices such as electric chain blocks and electric hoists used for overhead cranes, etc., not only the regenerative power generated by the lifting motor when lowering the load, but also in a short cycle due to wobbling during traversal It is also required to store regenerative power during power running and regeneration.

  FIG. 1 is a diagram showing a system configuration example of a conventional power supply device for this type of electric hoisting and traversing device. As shown in the figure, the power supply for the electric hoisting and traversing device includes a traverse power supply circuit 110 and an elevating power supply circuit 120. The horizontal power supply circuit 110 includes a rectifier 111, a DC circuit 112 including a smoothing capacitor 113, and a horizontal inverter 114. The lifting power supply circuit 120 includes a rectifier 121, a DC circuit 122 including a smoothing capacitor 123, and a lifting inverter 124. The AC power supply 116 is connected only to the rectifier 121 of the lifting power supply circuit 120, and the AC from the AC power supply 116 is converted into direct current by the rectifier 121, and the DC power is converted to the DC circuit 122 of the lifting power supply circuit 120 and the transverse power supply circuit. 110 is supplied to a DC circuit 112. The DC power supplied from the DC circuit 112 of the traverse power supply circuit 110 to the traverse inverter 114 is converted into AC power of a predetermined frequency, supplied to the traverse motor M1, and the DC circuit 122 of the lift power supply circuit 120 from the DC inverter 122. The DC power supplied to is converted into AC power having a predetermined frequency and supplied to the lifting motor M2.

  One DC storage device 117 is commonly connected to the DC circuit 112 of the traverse power supply circuit 110 and the DC circuit 122 of the elevating power supply circuit 120, and the direct current converted by the rectifier 121 and the regenerative power of the traverse motor M1 are used. The direct current converted by the transverse inverter 114 and the direct current converted from the regenerative power of the lifting motor M2 by the lifting inverter 124 are stored in the power storage device 117. The direct current stored in the power storage device 117 is supplied to the traverse inverter 114 and the lift inverter 124 via the direct current circuit 112 of the traverse power supply circuit 110 and the direct current circuit 122 of the lift power supply circuit 120. It is converted into alternating current by the inverter 124 and supplied to the traversing electric motor M1 and the lifting electric motor M2.

  Reference numerals 134 and 133 denote inrush current suppression resistors of the traversing power supply circuit 110 and switching contacts for bypassing (invalidating) the inrush current suppression resistor 134. Reference numerals 136 and 135 denote inrush currents of the lifting power supply circuit 120, respectively. It is a switching resistor that bypasses (invalidates) the suppression resistor and the inrush current suppression resistor 136. In addition, the power storage device 117 is connected to the DC circuit 112 of the traversing power supply circuit 110 and the lifting / lowering circuit through a parallel circuit of the initial charging resistor 137 and the initial charging switch contact 138 and the charging / discharging switching contact 139. The DC circuit 122 of the power supply circuit 120 is connected. The row power supply circuit 110 including the rectifier 111 and the row inverter 114 is configured as an inverter unit INU1, and the lift power supply circuit 120 including the rectifier 121 and the lift inverter 124 is configured as an inverter unit INU2. The basic hardware configuration of the inverter units INU1 and INU2 is a general-purpose inverter unit, and a commercially available one can also be used.

  In the power supply device for the electric hoisting and traversing apparatus having the above system configuration, the motor capacity is, for example, a rated capacity of 3.7 kW for the lifting motor M2 and a rated capacity of 0.4 kW for the traversing motor M1. Since the rated capacity of the traverse motor M1 is sufficiently smaller than the rated capacity of the lift motor M2, the power of the traverse inverter 114 is supplied from the lift power circuit 120 to the DC circuit 112 of the traverse power circuit 110. There is no problem in capacity even if it is supplied. When the power is turned on, the AC power supply 116 is turned on with the switching contact 133, the switching contact 135, the initial charging switch contact 138, and the charging / discharging switching contact 139 open under the control of the control unit 141 and the control unit 144. To do. As a result, since current is supplied to the DC circuit 112 and the DC circuit 122 through the inrush current suppression resistor 134 and the inrush current suppression resistor 136, an excessive inrush current is suppressed. When the inrush current ends, the switching contact 133 and the switching contact 135 are closed. The smoothing capacitor 113 and the smoothing capacitor 123 are charged about 1 second after the power is turned on. When the amount of electricity stored in the electricity storage device 117 is zero or not stored for a long time and the amount of electricity stored is small due to natural discharge, the initial charge switch contact 138 is closed and the electricity storage device 117 is charged through the initial charge resistor 137. Initial charging is completed in about 180 seconds. When the initial charge is completed, the initial charge switch contact 138 is opened, and the charge / discharge switch contact 139 is closed. Thereby, charging / discharging of the electrical storage device 117 becomes possible at the time of power running and regeneration of the traversing electric motor M1 and the lifting electric motor M2.

The traverse power supply circuit 110 and the lift power supply circuit 120 are provided with a control unit 141 and a control unit 144, respectively. DC voltage V _D of the DC circuit 112 detected by the voltage sensor 143 is input to the control unit 141, so that the DC voltage V _D of the DC circuit 122 detected by the voltage sensor 146 is input to the control unit 144 It has become. Reference numeral 142 denotes a transverse braking switching element (transistor), and the controller 141 closes the lateral braking opening / closing element 142 when the electrical storage device 117 is fully charged and regenerates the transverse electric motor M1, thereby generating a regenerative current as a braking resistance. The instrument 148 is energized to generate heat. Further, reference numeral 145 denotes a lifting brake switching element (transistor), and the control unit 144 closes the lifting brake switching element 145 when the power storage device 117 is fully charged, and the lifting motor M2 is regenerated, so that the regenerative current is supplied as a braking resistance. The instrument 149 is energized to generate heat. In this way, overvoltage of the DC circuit 112 and the DC circuit 122 and overcharging of the power storage device 117 are prevented.

JP 2010-100384 A

  In the above prior art, for example, an electric double layer capacitor or a lithium ion capacitor is used as the electricity storage device 117. However, the amount of electricity stored is zero or the amount of electricity stored is small due to long-term discharge just after the installation of a new electricity storage device 117. In this case, the voltage of the DC circuit 122 of the lifting power supply circuit 120 is applied through the initial charging resistor 137 having a predetermined resistance value, and the electric storage device is formed of an electric double layer capacitor or a lithium ion capacitor with a predetermined current. It is necessary to charge 117 (initial charge) until the stored voltage reaches a predetermined voltage. Therefore, there is a problem that the electric hoisting and traversing device cannot be operated during the initial charging (for example, 180 seconds).

  In addition, every time the power is turned on every day, a current obtained by converting the alternating current from the alternating current power supply 116 into a direct current by the rectifier 121 is used for initial charging. In addition, the initial charging resistor 137 and components such as an initial charging switch contact 138 and a charging / discharging switching contact 139 for connecting / opening the initial charging resistor 137 between the DC circuit 122 and the power storage device 117. There is a problem that the number of parts increases, and the price of the electric hoisting and traversing device increases accordingly.

The present invention has been made in view of the above points, and without increasing the number of parts, can be directly moved up / down and traversed without initial charge waiting time for the power storage device after the power is turned on. It is an object of the present invention to provide an energy-saving electric hoisting and traversing power supply that can store regenerative power generated during power regeneration in a power storage device and can supply the stored power to a lifting motor and a traversing motor during power running. .

In order to solve the above-described problems, the present invention includes a rectifier, a DC circuit, and a lift inverter, converts alternating current from an AC power source into DC by the rectifier, and supplies the DC to the lift inverter via the DC circuit. and lifting power circuit for supplying to the lift motor is converted into alternating current by an inverter, a DC circuit, and a traverse inverter, the direct current from the rectifier circuit is supplied to the rampant inverter via a DC circuit, in lateral rows inverter Transverse power supply circuit that converts to AC and supplies it to the electric motor for traversal, parallel connection circuit that connects the DC circuit of the power supply circuit for elevating and the DC circuit of the traverse power supply circuit in parallel, and charge / discharge for the parallel connection circuit a storage device shared by the lifting power circuit connected via a switching element and rampant power supply circuit, the first system to oN · OFF in accordance with the voltage value of the DC circuit to the DC circuit of the power supply circuit for the lifting line A braking resistor connected through the use switching element, opening and closing the second brake to ON at a lower voltage values than that voltage values first braking-off element to ON to a DC circuit of the transverse power circuit An initial charging resistor connected between the charge / discharge switching element and the electricity storage device via the element and having a resistance value set so that a current greater than or equal to a current value suitable for initial charging of the electricity storage device does not flow to the electricity storage device ; In the power supply device for the electric hoisting and traversing device.

Further, in the power supply device for the electric hoisting and traversing device according to the present invention, the charge / discharge switching element is turned on when the voltage between the terminals of the power storage device is equal to or higher than the initial charge completion voltage value when the initial charge is completed, and the output voltage value of the rectifier Vo, the initial charge completion voltage value of the power storage device Vs, the allowable maximum voltage value of the power storage device Vmax, the voltage value V ₁ for turning on the second braking switch element, and the voltage value V for turning on the first brake switch element _{When 2} , the following relationship is established.
0.95 × Vo ≦ Vs <Vo
Vmax / 1.05 ≦ V ₂ ≦ Vmax
Vo <V ₁ <V ₂

  Moreover, the present invention is characterized in that, in the power supply device for the electric hoisting and traversing device, the power storage device is an electric double layer capacitor or a lithium ion capacitor.

  Further, the present invention provides the above-described electric hoisting and traversing device power supply device, wherein the lifting power circuit and the traversing power circuit include at least a rectifier, a direct current circuit including a smoothing capacitor, an inverter and a general-purpose inverter unit including a control unit. It is characterized by using.

The present invention relates to a parallel connection circuit for connecting a DC circuit of a lifting power supply circuit and a DC circuit of a transverse power supply circuit in parallel , a lifting power supply circuit connected to the parallel connection circuit via a charge / discharge switching element, and a row A power storage device shared by the power supply circuit, and a braking resistor connected to the DC circuit of the lifting power circuit via a first braking switching element that is turned on and off according to the voltage value of the DC circuit ; , between the DC circuit to the first braking-off device power storage and discharge-off element through the second brake-off element is turned oN at a lower voltage values than that voltage values to oN device rampant power supply circuit connected since the current value or a current suitable for the initial charging of the electricity storage device is provided, the initial charging resistor whose resistance value is set so as not to flow in the electric storage device, when charged with the AC power supply, power storage device If the initial charge is not complete Since the OFF charging and discharging opening-closing device, regardless of the power storage quantity of the power storage device can be performed immediately lifting and traversing operation.

  In addition, the initial charging to the power storage device is performed by charging the power storage device from the second braking switch element via the initial charging resistor using the regenerative power generated during regeneration of the traverse motor and the lifting motor. Save power for initial charging. In addition, since the voltage of the DC circuit that turns on the second braking switching element is set to be lower than the voltage of the DC circuit that turns on the lifting brake switching element, the regeneration that can be processed by storing electricity in the power storage device. When regenerative power exceeding electric power is generated, it is automatically converted into thermal energy by the braking resistor via the first braking switching element regardless of the initial charging and charging / discharging operation. Necessary to prevent initial charging, transverse / lifting power running / regenerative discharge / charging, and overcharging of power storage devices without the need for parts to discriminate power running or regenerative operation. The number of parts can be reduced, and the cost and size of the apparatus can be reduced.

It is a figure which shows the system structural example of the power supply device for the conventional electric winding hoisting apparatus. It is a figure which shows the system structural example of the power supply device for electric hoisting and traversing apparatuses which concerns on this invention. It is a figure which shows the operating conditions of the switching contact 32 for charging / discharging, the switching element 27 for raising / lowering braking, and the switching element 17 for transverse braking.

  Hereinafter, embodiments of the present invention will be described in detail. FIG. 2 is a diagram showing a system configuration example of the power supply device for the electric hoisting and traversing device according to the present invention. As shown in the figure, the power supply device for the electric hoisting traverse device includes a traverse power supply circuit 10 and an elevating power supply circuit 20. The lifting power supply circuit 20 includes a rectifier 21, a DC circuit 22 including a smoothing capacitor 23, and a lifting inverter 24, and receives alternating current (R-phase, S-phase, and T-phase AC current) from the AC power supply 19. The rectifier 21 converts the current into direct current, supplies the direct current to the lift inverter 24 through the direct current circuit 22, and the lift inverter 24 converts the direct current into alternating current of a predetermined frequency and supplies it to the lift motor M2. The traverse power supply circuit 10 includes a rectifier 11 and a smoothing capacitor 13, and includes a DC circuit 12 connected to the DC circuit 22 of the lifting power supply circuit 20, and direct current from the DC circuit 22 passes through the DC circuit 12. Then, it is supplied to the traverse inverter 14, converted into alternating current by the traverse inverter 14, and supplied to the traverse motor M <b> 1.

  The AC power source 19 is connected only to the rectifier 21 of the lifting power supply circuit 20 as in the conventional example of FIG. 1, but the rated capacities of the lifting motor M2 and the traversing motor M1 are, for example, lifting and lowering as in FIG. The electric motor M2 is 3.7 kW and the traverse motor M1 is 0.4 kW, and the rated capacity of the lifting motor M2 is sufficiently larger than the rated capacity of the traverse motor M1 (the capacity of the normal traverse motor M1 is There is no problem in terms of capacity even if power is supplied from the lifting power circuit 20 to the traverse power circuit 10 from 1/8 to 1/4 of the lifting motor M2. As in the case of FIG. 1, the traverse power supply circuit 10 including the rectifier 11 and the traverse inverter 14 is configured as an inverter unit INU1, and the elevating power supply circuit 20 including the rectifier 21 and the elevating inverter 24 is configured as an inverter unit INU2. It is configured. The hardware configurations of the inverter units INU1 and INU2 are general-purpose inverter units, and commercially available ones can also be used. Here, the rectifier 11 is not used in the inverter unit INU1.

Reference numeral 18 denotes an electric storage device composed of an electric double layer capacitor, a lithium ion capacitor, or the like. The electric storage device 18 is shared by the elevating power supply circuit 20 and the traverse power supply circuit 10, that is, via a charge / discharge switching contact 32. The DC circuit 22 of the lifting power circuit 20 and the DC circuit 12 of the traversing power circuit 10 are connected. The power storage device 18 is connected to the DC circuit 12 through a traverse braking switching element (transistor) 17 that is a second braking switching element and an initial charging resistor 16. The inverter unit INU1 and the inverter unit INVU2 include a control unit 25 and a control unit 26, respectively. The controller 25 receives the DC voltage V _D of the DC circuit 12 detected by the voltage sensor 15, and the controller 26 receives the DC voltage V _D of the DC circuit 22 detected by the voltage sensor 28. It has become. Further, the control unit 25 so that the storage voltage of the electric storage device 18 detected by the power storage voltage sensor 31 (inter-terminal voltage) V _E is input. Reference numeral 34 denotes an inrush current suppressing resistor that suppresses an inrush current when the power supply for the traversing power supply circuit 10 is turned on. Reference numeral 33 denotes an open / close contact that bypasses (invalidates) the inrush current suppressing resistor 34 . An inrush current suppression resistor 35 that suppresses an inrush current when power is turned on, and a switching contact 35 that bypasses (invalidates) the inrush current suppression resistor 36. The switching contacts 33 and 35 are opened for a predetermined time (for example, 1 second) when the power is turned on under the control of the control unit 25 and the control unit 26, respectively, and the inrush current suppression resistors 34 and 36 are made effective. A current is supplied to the DC circuits 22 and 12 through 36 to suppress an excessive inrush current.

Here, the AC power source 19 is a three-phase 200V commercial power source. The initial charge completion voltage V _S is preferably set to 95% (≈270 V) of the DC voltage V _O (= 200 V × (2) ^1/2 ) output from the rectifier 21. If it is 95% or less, an excessive inrush current flows even when the charge / discharge contact 32 is turned on, and the life of the electricity storage device is reduced. The control unit 25 monitors the storage voltage _{V E} of the electric storage device 18 detected by the DC voltage _{V D,} the power storage voltage sensor 31 of the direct current circuit 12 detected by the voltage sensor 15, as shown in FIG. _{3, V} S> V _E In the charging and discharging switching contacts 32 and OFF, the turned ON the _{V S} ≦ _V charge and discharge on-off contact 32 in _E. Further, when the DC voltage of the DC circuit 12 reaches a predetermined voltage value (370 V in this case) by the regenerative operation of the traverse / lifting motor, the traverse braking switch element (transistor) 17 is turned on to turn on the DC circuit 12 and the electric storage device 18. Are connected through an initial charging resistor 16. Furthermore, when the DC voltage V _D of the DC circuit 12 reaches a predetermined voltage value (here, 380 V), the first braking switching element (transistor) 27, which is the first braking switching element, is turned on, and the lifting braking resistor 29 is turned on. Connect to DC circuit 22. If the DC circuit voltage is too high when the initial charging is completed and the charge / discharge switching contact 32 is switched from OFF to ON, wait until the DC circuit voltage drops to the voltage across the terminals of the storage device. Is preferred.

A power supply device for on the electric winding traversing device, a DC circuit for turning ON of the DC voltage V _{1 (370V)} the lifting braking switching element 27 of the DC circuit 12 to ON of the transverse damping-off device 17 via the pre-controller 25 22 is set lower than the DC voltage V ₂ (380 V) (V ₁ <V ₂ ). When the three-phase 200V AC power supply 19 is turned on, the control unit 25 compares the storage voltage V _E of the storage device 18 with the initial charge completion voltage V _S, and when V _S > V _E as described above, the charge / discharge switching is performed. The contact 32 is turned off. Subsequently, by operating the push button switches of hoisting, lowering, right traversing, and left traversing of an operation box (not shown), the electric hoisting traverse device is moved up and down and traversed. During power running on the load, direct current is supplied from the DC circuit 22 to the lift inverter 24, and the lift inverter 24 converts the direct current into alternating current of a predetermined frequency and supplies it to the lift motor M2. During regeneration under load, regenerative AC power generated by the lifting motor M2 is converted into DC by the lifting inverter 24 and supplied to the DC circuit 22. At the time of power running in the transverse operation, direct current is supplied from the DC circuit 12 to the transverse inverter 14, converted into alternating current of a predetermined frequency by the transverse inverter 14 and supplied to the transverse motor M 1, and at the time of regeneration (deceleration) operation, the transverse motor The regenerative power generated by M1 is DC converted by the traverse inverter 14 and supplied to the DC circuit 12. The DC voltages of the DC circuit 12 and the DC circuit 22 are simultaneously boosted by the regenerative power of the lifting and lowering motor M2 and M1.

The control unit 25 monitors the DC voltage _{V D} of the DC circuit 12, when the DC voltage _{V D} becomes higher (370 V in this case) the DC voltages _{V 1} to ON rampant braking switching element 17, the opening and closing lateral line braking The element 17 is turned on, and the direct current from the direct current circuit 12 is supplied to the power storage device 18 through the initial charging resistor 16 to be stored. The initial charging resistor 16 is set to a resistance value so that a current equal to or higher than the current value suitable for the initial charging of the electricity storage device 18 does not flow. A regenerative current (electric power) greater than or equal to a current value suitable for initial charging is generated, and the DC voltage of the DC circuit 22 (= DC circuit 12) is a DC voltage value V ₂ (here, 380V) that turns on the opening / closing brake switching element 27. ) When the above is reached, the elevating brake switching element 27 is turned on, the elevating brake resistor 29 is energized to dissipate heat, prevent overvoltage of the DC circuit 12 and DC circuit 22 and continue the lowering or traversing operation. be able to.

It progressed power storage by the regenerative power of the power storage device 18, and ON the discharge on-off contact 32 after storage voltage V _E of the electric storage device 18 has reached the initial charging completion voltage V _S, the storage device 18 a DC circuit 11 and the DC circuit After that, charging / discharging is efficiently repeated with the power running / regenerative operation of the elevating motor M2 and the traverse motor M1.

Incidentally, when the commercial power supply three-phase 200V is turned on, when the storage voltage V _E of the electric storage device 18 was the initial charge completion voltage V _S or more, the control unit 25 is turned ON to charge and discharge for the switching contacts 32. The electric power from the three-phase 200V commercial power supply or the power storage device 18 is supplied to the DC circuit 12 and the DC circuit 22 through the inrush current suppression resistor 34 and the inrush current suppression resistor 36. The inrush current suppression resistor 34 and the inrush current suppression resistor 36 are standardly equipped in a general-purpose inverter unit, and the inrush current suppression resistor 34 and the inrush current suppression resistor 36 are effective for about 1 second after the power is turned on. When about 1 second elapses, the switching contacts 33 and 35 are turned ON, and the inrush current suppression resistor 34 and the inrush current suppression resistor 36 are bypassed and invalidated.

  As described above, when the up / down and traverse operation is performed with the charge / discharge switching contact 32 in the ON state, the DC power stored in the power storage device 18 during power running is converted to the inrush current suppression resistor 36 or the switching contact 35 of the DC circuit 22. And the inrush current suppression resistor 34 or the switching contact 33 of the DC circuit 12 is supplied to the lift inverter 24 and the traverse inverter 14, and is converted into alternating current of a predetermined frequency by the lift inverter 24 and the traverse inverter 14. It is supplied to the electric motor M2 and the traversing electric motor M1. During regeneration, the AC regenerative power generated by the lift motor M2 and the traverse motor M1 is converted to direct current by the lift inverter 24 and the traverse inverter 14 and supplied to the DC circuit 22 and the DC circuit 12, respectively. Through the suppression resistor 36 or the switching contact 35 and the inrush current suppression resistor 34 or the switching contact 33 of the DC circuit 12, it is supplied to and stored in the power storage device 18.

When the voltage V _{D of the} DC circuit 12 (= DC circuit 22) rises and becomes equal to or higher than the voltage V2 (here, 380 (V)) for turning on the lifting brake opening / closing element 27, the lifting brake opening / closing element 27 as described above. Is turned ON, and current is supplied from the DC circuit 22 and the DC circuit 12 to the elevator braking resistor 29 to generate heat. As a result, the regenerative current after the power storage device 18 is fully charged is supplied to the up-and-down braking resistor 29 to generate heat, so the overvoltage of the DC circuit 12 (= DC circuit 22), electric double layer capacitor or lithium It is possible to prevent overcharging of the electricity storage device 18 including an ion capacitor or the like.

  As described above, in the electric hoisting and traversing apparatus provided with the lifting motor M2 and the traversing motor M1, the capacity of the traversing motor M1 is normally set to 1/8 to 1/4 of the capacity of the lifting motor M2. The capacity of the initial charging resistor 16 that is the braking resistor of the traverse electric motor M1 is also 1/8 to 1/4 of that of the lifting brake resistor 29. For the initial charging of the power storage device 18, charging is performed via the initial charging resistor 16 using the transverse braking switching element 17 having a smaller capacity than the hoisting braking switching element 27 (by turning on). Thus, the regenerative power that cannot be consumed by the power storage in the power storage device 18 is supplied to the lift braking resistor 29 having a capacity capable of generating and consuming the regenerative power of the traverse motor M1 and the lift motor M2 via the lift braking switching element 27. Since energization is performed and heat is consumed, overcharging of the electricity storage device 18 and overvoltage of the DC circuit 12 and DC circuit 22 can be prevented. The control unit 25 of the traverse inverter unit INU1 is provided with the control function for connecting the power storage device 18, and the elevator unit INU2 for raising and lowering is connected in parallel with the DC circuit 12 of the traverse inverter unit INU1. As a result, no special improvement for connecting the power storage device 18 is required, so that the apparatus is simple and the cost can be reduced.

In addition, after the AC power supply 19 is turned on, the electric hoisting and traversing device can be moved up and down immediately without performing initial charging of the electricity storage device 18 by separately provided initial charging means. Also, is possible to perform the DC voltage V _D of the initial charge also DC circuit 12 of the electric storage device 18 is a current from the DC circuit 12 and transverse braking switching element 17 becomes a predetermined value or more is turned ON, through the initial charging resistor 16 Because it can, there is no waste of power usage.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible. In the above example, an electric double layer capacitor or a lithium ion capacitor can be used as the electricity storage device 18, but the present invention is not limited to this, and a lithium ion battery having good charge / discharge characteristics can also be used.

  The present invention is equipped with a power storage device composed of an electric double layer capacitor, a lithium ion capacitor, etc., stores regenerative power during regeneration of the lifting motor and the traversing motor in the power storage device, and power running of the lifting motor and the traversing motor. Sometimes, in a power supply device for an electric hoisting and traversing device configured to supply electric power stored in a power storage device to an ascending / descending motor and a traversing motor, the ascending / descending power circuit and the traversing power circuit include a rectifier and an inverter. The general-purpose inverter unit can be used without increasing the number of parts, there is no waiting time for the initial charging of the electricity storage device, the operation can be performed immediately after power-on, and it can be used as a power supply device for an electric hoisting and traversing device .

DESCRIPTION OF SYMBOLS 10 Traverse power supply circuit 11 Rectifier 12 DC circuit 13 Smoothing capacitor 14 Traverse inverter 15 Voltage sensor 16 Initial charging resistor 17 Traverse braking switch 18 Storage device 19 AC power supply 20 Lifting power supply circuit 21 Rectifier 22 DC circuit 23 Smoothing capacitor DESCRIPTION OF SYMBOLS 24 Lifting inverter 25,26 Control part 27 Opening / closing brake switching element 28 Voltage sensor 29 Lifting braking resistor 31 Storage voltage sensor 32 Charging / discharging switching contact 33 Opening / closing contact 34 Inrush current suppression resistor 35 Opening / closing contact 36 Inrush current suppression resistance M1 Traverse motor M2 Lift motor INU1 Inverter unit INU2 Inverter unit

Claims (4)

A rectifier, a DC circuit, and a lift inverter are provided. AC from an AC power source is converted to DC by the rectifier, supplied to the lift inverter through the DC circuit, and converted to AC by the lift inverter for lifting. An elevating power supply circuit to be supplied to the electric motor;
A DC circuit, and a traverse inverter, the direct current from the rectifier circuit is supplied to said transverse inverter through the DC circuit, a transverse power circuit for supplying the transverse electric motor is converted into alternating current in lateral rows inverter ,
A parallel connection circuit for connecting the DC circuit of the lifting power circuit and the DC circuit of the traversing power circuit in parallel;
An electric storage device shared by the power supply circuit for ascending and descending connected to the parallel connection circuit via a charge / discharge switching element and the power supply circuit for traversing,
A braking resistor connected to the DC circuit of the ascending / descending power supply circuit via a first braking switching element that is turned ON / OFF according to the voltage value of the DC circuit ;
Wherein said charging and discharging switching element via a second braking switching element to ON at a lower-have voltage values before Symbol voltage values for ON the first braking-off element in the DC circuit of the transverse power supply circuit An initial charging resistor connected between power storage devices and having a resistance value set so that a current equal to or greater than a current value suitable for initial charging of the power storage device does not flow to the power storage device ;
A power supply device for an electric hoisting and traversing device.

In the electric hoist traverse device power supply device according to claim 1,
The charge / discharge switching element is turned on when the voltage between the terminals of the electricity storage device is equal to or higher than the initial charge completion voltage value at which the initial charge is completed,
The output voltage value of the rectifier is Vo, the initial charge completion voltage value of the power storage device is Vs, the allowable maximum voltage value of the power storage device is Vmax, the voltage value V ₁ for turning on the second braking switching element, the first braking If the voltage value V ₂ to ON for use switching element, characterized in that the following relationship is established.
0.95 × Vo ≦ Vs <Vo
Vmax / 1.05 ≦ V ₂ ≦ Vmax
Vo <V ₁ <V ₂ In the power supply device for electric hoisting and traversing devices according to claim 1 or 2,
The electric storage device is an electric double layer capacitor or a lithium ion capacitor. In the electric hoisting and traversing apparatus power supply device according to any one of claims 1 to 3,
A power supply device for an electric hoisting and traversing device, wherein a general-purpose inverter unit including at least a rectifier, a DC circuit including a smoothing capacitor, an inverter, and a control unit is used for the lifting power circuit and the traverse power circuit.

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