CN218024797U - Elevator electrical system and elevator system - Google Patents

Abstract

The utility model discloses an elevator electrical system and elevator system relates to elevator technical field. This elevator electrical system includes charger, controller, battery circuit, switch distribution circuit, first output circuit and second output circuit, wherein: the charger is respectively connected with the power grid and the switch distribution circuit, the battery circuit is connected with the switch distribution circuit, the switch distribution circuit is respectively connected with the first output circuit and the second output circuit, and the controller is configured to control the switch distribution circuit so that the charger and/or the battery circuit can be powered at low voltage. The charger in the elevator electrical system obtains electricity from the power grid so as to supply power to the elevator electrical system at low voltage, and the elevator electrical system is always in a low-voltage power supply state, so that the electricity utilization safety is improved. And meanwhile, the switch power distribution circuit and the battery circuit are arranged, and the power supply mode of the first output circuit and the second output circuit can be controlled by controlling the switch power distribution circuit, so that the battery circuit is protected.

Description

Elevator electrical system and elevator system

Technical Field

The utility model relates to an elevator technical field especially relates to an elevator electrical system and elevator system.

Background

The elevator is used as a main riding tool for people to go up and down in a high-rise building, great convenience is brought to the life of people along with the popularization of the elevator in daily life, and meanwhile, the elevator is also an important subsystem for building intellectualization. The elevator system monitors and controls the operation of the elevator, and the safety and convenience of the building are closely related to the design of the elevator system. With the increasing height of the floors of urban buildings, through continuous improvement and breakthrough over the years, the elevator control systems are more and more widely applied and more in variety, and how to improve the design of the elevator system to improve the use safety of the elevator system becomes a critical problem.

The frequency converter, the band-type brake power supply and the door motor driver in the elevator system directly take power from the power grid under normal conditions, and are uniformly supplied with power by the emergency power supply when the power grid is powered off, the whole power supply framework system is a high-voltage system and adopts a uniform power supply mode, and each device in the elevator system has power utilization safety under the condition of high-voltage power supply.

SUMMERY OF THE UTILITY MODEL

The utility model provides an elevator electrical system and elevator system to solve the power consumption safety that elevator system exists when the high voltage power supply among the prior art, and changed the power supply mode of system.

In order to solve the above problem, the utility model provides an elevator electrical system, including charger, controller, battery circuit, switch distribution circuit, first output circuit and second output circuit, wherein:

the charger is respectively connected with the power grid and the switch power distribution circuit, the battery circuit is connected with the switch power distribution circuit, the switch power distribution circuit is respectively connected with the first output circuit and the second output circuit, and the controller is configured to control the switch power distribution circuit so that the charger and/or the battery circuit are powered by low voltage.

Further, the controller is respectively connected with the charger, the battery circuit, the switch power distribution circuit, the first output circuit and the second output circuit in a communication mode.

Further, the switch power distribution circuit comprises a first switch, one end of the first switch is connected with the charger, and the other end of the first switch is connected with the battery circuit, the first output circuit and the second output circuit.

Further, the switching power distribution circuit further comprises a second switch and a third switch, wherein: one end of the second switch is connected with the charger, and the other end of the second switch is connected with one end of the third switch and the second output circuit; one end of the third switch is connected with the second output circuit, and the other end of the third switch is connected with the battery circuit and the first output circuit.

Further, the switching power distribution circuit further comprises a fourth switch, a first diode and a second diode, wherein: one end of the fourth switch is connected with the charger, and the other end of the fourth switch is connected with the battery circuit and the first output circuit; the anode of the first diode is connected with the charger, and the cathode of the first diode is connected with the second output circuit; the anode of the second diode is connected with the battery circuit, and the cathode of the first diode is connected with the second output circuit.

In order to solve the problem, the utility model also provides an elevator system, including elevator electrical system, the foretell elevator electrical system of elevator electrical system.

The utility model provides an elevator electrical system includes charger, controller, battery circuit, switch distribution circuit, first output circuit and second output circuit, wherein: the charger is respectively connected with the power grid and the switch distribution circuit, the battery circuit is connected with the switch distribution circuit, the switch distribution circuit is respectively connected with the first output circuit and the second output circuit, and the controller is configured to control the switch distribution circuit so that the charger and/or the battery circuit can be powered at low voltage. The charger in the elevator electrical system gets electricity from the power grid to supply power to the elevator electrical system at low voltage, and the elevator electrical system is always in a low-voltage power supply state, so that the electricity utilization safety is improved. And meanwhile, the switch power distribution circuit and the battery circuit are arranged, and the power supply mode of the first output circuit and the second output circuit can be controlled by controlling the switch power distribution circuit, so that the battery circuit is protected.

Drawings

Fig. 1 is a schematic structural view of a first embodiment of an elevator electrical system of the present invention;

fig. 2 is a schematic structural view of a second embodiment of the elevator electrical system of the present invention;

fig. 3 is a schematic structural view of a third embodiment of the elevator electrical system of the present invention;

fig. 4 is a schematic structural view of a fourth embodiment of the elevator electrical system of the present invention;

fig. 5 is a schematic structural view of the first embodiment of the elevator system of the present invention.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The terms "first", "second", etc. in the present application are used to distinguish different objects, not to describe a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein may be combined with other embodiments.

Referring to fig. 1-4, fig. 1 is a schematic structural view of a first embodiment of an electrical system 1 of an elevator according to the present invention; fig. 2 is a schematic structural view of a second embodiment of the elevator electrical system 1 of the present invention; fig. 3 is a schematic structural view of a third embodiment of the elevator electrical system 1 of the present invention;

fig. 4 is a schematic structural view of a fourth embodiment of the elevator electrical system of the present invention. As shown in fig. 1, the elevator electrical system 1 of the present invention includes: the charger 10, the controller 20, the battery circuit 30, the switching power distribution circuit 40, the first output circuit 50, and the second output circuit 60.

Specifically, the charger 10 is connected to the power grid 2 and the switching power distribution circuit 40, and the elevator electrical system 1 is converted from the high-voltage power supply of the power grid 2 to the low-voltage power supply of the charger 10 by the conversion of the charger 10, and the charger 10 is connected to the switching power distribution circuit 40. The controller 20 is communicatively coupled to the charger 10, the battery circuit 30, the switching power distribution circuit 40, the first output circuit 50, and the second output circuit 60, respectively.

Further, the switching power distribution circuit 40 is connected to the battery circuit 30, the first output circuit 50, and the second output circuit 60, respectively. The controller 20 controls the charger 10 to supply low-voltage power to the battery circuit 30 to charge the battery circuit 30 when the charge of the battery circuit 30 is lower than the optimal charge range by controlling the switch power distribution circuit 40. And the battery circuit 30 is connected to the switch power distribution circuit 40, and under the condition that the battery circuit 30 works normally, the controller 20 controls the switch power distribution circuit 40 to enable the charger 10 and/or the battery circuit 30 to supply power to the first output circuit 50 and the second output circuit 60 at a low voltage.

Optionally, the charger 10 supplies the first output circuit 50 and the second output circuit 60 with a voltage greater than the battery circuit 30 supplies the first output circuit 50 and the second output circuit 60 with a voltage. The charger 10 converts the alternating current with fixed voltage and frequency input by the power grid 2 into the low-voltage direct current required by the elevator electrical system 1, so that each device of the elevator electrical system 1 supplies power for low voltage in actual operation, and the power utilization safety of the elevator electrical system 1 in actual use is improved.

It should be noted that, conventionally, in order to cope with the power failure of the power grid 2, a safety battery needs to be provided in the elevator electrical system 1 to supply power to each device in the system when the power grid 2 stops supplying power to the elevator electrical system 1, so as to avoid the situation that a user is trapped in the elevator car after the power failure of the power grid 2 occurs. When the safety battery is used, the power grid 2 supplies power to all devices of the elevator electrical system 1 and also supplies power to the safety battery, and the safety battery which is in an idle state for a long time consumes power. In the embodiment, the battery circuit 30 is arranged in the elevator electrical system 1, and the battery circuit can be used as a safety battery in the elevator electrical system 1 when the power grid 2 stops supplying power while supplying power to the devices of the elevator electrical system 1, so that the additional arrangement of the safety battery in the system is avoided, and the energy saving performance of the elevator electrical system 1 is improved.

Optionally, the battery circuit 30 includes a battery management device 31, as shown in fig. 2 and 3, the battery management device 31 being communicatively coupled to the controller 20. The controller 20 detects the battery voltage, the electric quantity and the temperature of the battery circuit 30 in real time through communication with the battery management device 31, prevents overcharge and overdischarge of the battery circuit 30, enables the electric quantity of the battery circuit 30 to be in the optimal electric quantity range all the time, and prolongs the service life of the battery circuit 30. By providing the battery management device 31 in the battery circuit 30, each unit of the battery circuit 30 can be intelligently managed and maintained, and the use state of the battery circuit 30 can be monitored, thereby improving the safety and reliability of the battery circuit 30 during actual operation.

The safety battery is required to be arranged in the elevator electrical system 1 to cope with the situation of power failure of the power grid 2 under the conventional condition so as to supply power to each device in the system when the power grid 2 stops supplying power to the elevator electrical system 1, the safety battery is not detected and maintained in the elevator electrical system 1, and the situation that the safety battery fails to supply power is easy to occur when the power grid 2 is powered off, so that the trouble of users is caused. The battery management device 31 is arranged to detect the battery circuit 30 in real time, and the battery circuit 30 can be used as a safety battery in the elevator electrical system 1 when the power grid 2 stops supplying power, so that the user is prevented from being trapped due to the failure of the battery circuit 30.

Optionally, the first output circuit 50 includes a frequency converter 51, a brake power supply circuit 52, and a hoisting machine 53. The controller 20 is connected with the frequency converter 51 in a communication way, the frequency converter 51 is also respectively connected with the switch power distribution circuit 40 and the tractor 53, and the brake power supply circuit 52 is respectively connected with the switch power distribution circuit 40 and the tractor 53.

The frequency converter 51 and the brake power supply circuit 52 are supplied with power based on the low voltage of the charger 10 and/or the battery circuit 30 to drive the traction machine 53 to run, and the frequency converter 51 converts the direct current output by the switching distribution circuit 40 into alternating current during operation and supplies the alternating current to the traction machine 53, and the traction machine 53 is used as a power source to enable the elevator car to perform vertical transportation tasks up and down along guide rails in the hoistway under the driving of the traction machine 53.

It should be noted that, the utility model discloses a converter 51 is low-voltage converter 51, and the insulated gate bipolar transistor who uses inside down converter 51 under original high-pressure condition can be replaced by the field effect transistor that the price is cheaper, and the use of converter 51 under the low pressure power supply condition is satisfied enough to converter 51's manufacturing cost has been reduced. The frequency converter 51 adjusts the magnitude and frequency of the supply voltage through the fet, and provides the required driving signal according to the actual need of the hoisting machine 53, so as to achieve the purpose of energy saving and speed regulation, and in addition, the frequency converter 51 has many protection functions, such as overcurrent, overvoltage, overload protection, and the like. Meanwhile, the frequency converter 51 receives direct current, a rectifier bridge for converting the alternating current into the direct current is not required to be arranged in the frequency converter 51, the number of bus capacitors is reduced, the weight and the size of the frequency converter 51 are further reduced, and based on the arrangement of the frequency converter 51, the frequency converter 51 and the traction machine 53 can be integrated in actual production and manufacturing, so that the size of the elevator electrical system 1 can be reduced.

Optionally, the second output circuit 60 includes a door motor driver 61, a door motor 62, a first switching power supply 63, a second switching power supply 64, a system load 65, and a safety loop 66. The controller 20 is in communication connection with the door motor driver 61, the door motor driver 61 is respectively connected with the switch power distribution circuit 40 and the door motor 62, the first switch power supply 63 is respectively connected with the switch power distribution circuit 40 and the system load 65, and the second switch power supply 64 is respectively connected with the switch power distribution circuit 40 and the safety loop 66.

The door motor driver 61 is supplied with power based on the low voltage of the charger 10 and/or the battery circuit 30 to drive the door motor 62 to operate, the door motor driver 61 and the door motor 62 constitute a driving system of the elevator door, and the door motor 62 controls the opening or closing of the elevator door of the elevator car during the operation. The first switching power supply 63 is powered based on the low voltage of the charger 10 and/or the battery circuit 30 to power the system load 65. The second switching power supply 64 is powered based on the low voltage of the charger 10 and/or the battery circuit 30 to power the safety loop 66.

As shown in fig. 2, the switching distribution circuit 40 includes a first switch 41, one end of the first switch 41 is connected to the charger 10, and the other end of the first switch 41 is connected to the battery circuit 30, the first output circuit 50, and the second output circuit 60.

The battery circuit 30 is in the optimal operating range based on the amount of power of the battery circuit 30, and the battery circuit 30 operates normally. The controller 20 stops the charger 10 from charging the battery circuit 30 by controlling the first switch 41 to be turned off, and the battery circuit 30 connects the first output circuit 50 and the second output circuit 60, supplies power to the first output circuit 50 and the second output circuit 60 at a low voltage, drives the traction machine 53 to operate by supplying power to the inverter 51, drives the door motor 62 to operate by supplying power to the door motor driver 61, and supplies power to the system load 65 and the safety circuit 66.

Alternatively, when the battery circuit 30 is connected to the frequency converter 51 in the first output circuit 50, the energy generated when the hoisting machine 53 operates can be fed back to the battery circuit 30, the energy fed back can be secondarily utilized by the battery circuit 30, the energy saving performance of the elevator electrical system 1 is improved, and meanwhile, a brake for consuming the energy fed back by the hoisting machine 53 can be omitted from the elevator electrical system 1, so that the manufacturing cost of equipment is saved.

Based on the capacity of the battery circuit 30 being lower than the optimal operating range, the controller 20 controls the first switch 41 to be turned on, so that the charger 10 is connected to the battery circuit 30 through the first switch 41, and the charger 10 supplies low-voltage power to the battery circuit 30 to charge the battery circuit 30. The controller 20 monitors the electric quantity of the battery circuit 30 in real time through the battery management device 31, and controls the charger 10 to charge the battery circuit 30 by controlling the first switch 41, so that the electric quantity of the battery circuit 30 is always in the optimal working range when the battery circuit 30 works, and the service life of the battery circuit 30 is prolonged.

The battery circuit 30 stops supplying power to the first output circuit 50 and the second output circuit 60 based on the operation abnormality of the battery circuit 30. The controller 20 supplies power to the first output circuit 50 and the second output circuit 60 at a low voltage by controlling the first switch 41 to be turned on so that the charger 10 is connected to the first output circuit 50 and the second output circuit 60 through the first switch 41, thereby driving the traction machine 53 to operate by supplying power to the inverter 51, driving the door motor 62 to operate by supplying power to the door motor driver 61, and supplying power to the system load 65 and the safety circuit 66. Through the control of the first switch 41, when the battery circuit 30 is in a normal state, the battery circuit 30 supplies power at low voltage, or when the battery circuit 30 works abnormally, the charger 10 supplies power at low voltage, and all devices in the elevator electrical system 1 are always supplied with power at low voltage, so that the power utilization safety of the elevator electrical system 1 is improved.

In the embodiment, the same power supply device is used for the first output circuit 50 and the second output circuit 60, and the controller 20 controls the first switch 41 to enable the charger 10 or the battery circuit 30 to simultaneously supply power to the first output circuit 50 and the second output circuit 60.

As shown in fig. 3, the switching power distribution circuit 40 includes a second switch 42 and a third switch 43. One end of the second switch 42 is connected to the charger 10, and the other end of the second switch 42 is connected to one end of the third switch 43 and the second output circuit 60; one end of the third switch 43 is connected to the second output circuit 60, and the other end of the third switch 43 is connected to the battery circuit 30 and the first output circuit 50.

Based on the power of the battery circuit 30 being in the optimal operating range and the battery circuit 30 operating normally, the controller 20 controls the second switch 42 to be turned on and the third switch 43 to be turned off. The battery circuit 30 is connected with the first output circuit 50, and supplies power to the first output circuit 50 at low voltage, so as to drive the traction machine 53 to operate by supplying power to the frequency converter 51. The charger 10 is connected to the second output circuit 60 through the second switch 42 to supply the second output circuit 60 with low voltage, so as to supply the door motor driver 61 to drive the door motor 62 to operate, and supply the system load 65 and the safety loop 66 with power. When the battery circuit 30 is connected to the inverter 51 of the first output circuit 50, energy generated when the hoisting machine 53 operates can be fed back to the battery circuit 30, so that the battery circuit 30 can reuse the fed-back energy, thereby improving the energy saving performance of the elevator electric system 1.

The controller 20 controls the second switch 42 and the third switch 43 to be simultaneously turned on based on the charge of the battery circuit 30 being below the optimal operating range. The charger 10 is connected to the second output circuit 60 through the second switch 42 to supply the second output circuit 60 with low voltage, so as to supply the door motor driver 61 to drive the door motor 62 to operate, and supply the system load 65 and the safety loop 66 with power. And the charger 10 is connected to the battery circuit 30 through the second switch 42 and the third switch 43 to provide low voltage power to the battery circuit 30 to charge the battery circuit 30. Therefore, the electric quantity of the battery circuit 30 is monitored in real time, and the second switch 42 and the third switch 43 are controlled to control the charger 10 to charge the battery circuit 30, so that the electric quantity of the battery circuit 30 is always in the optimal working range when the battery circuit 30 works, and the service life of the battery circuit 30 is prolonged.

Based on the abnormal operation of the battery circuit 30, the battery circuit 30 stops supplying power to the first output circuit 50, and the controller 20 controls the second switch 42 and the third switch 43 to be simultaneously turned on. The charger 10 is connected to the first output circuit 50 through the second switch 42 and the third switch 43, and is connected to the second output circuit 60 through the second switch 42, simultaneously supplies power to the first output circuit 50 and the second output circuit 60 at a low voltage, drives the traction machine 53 to operate by supplying power to the frequency converter 51, drives the door motor 62 to operate by supplying power to the door motor driver 61, and supplies power to the system load 65 and the safety circuit 66.

In the embodiment, the same power supply device is used for the first output circuit 50 and the second output circuit 60 when the battery circuit 30 fails, the charger 10 supplies power to the first output circuit 50 and the second output circuit 60 simultaneously, different power supply devices are used when the battery circuit 30 works normally, the battery circuit 30 supplies power to the first output circuit 50, and the charger 10 supplies power to the second output circuit 60. The controller 20 controls the second switch 42 and the third switch 43 to control the manner in which the charger 10 and the battery circuit 30 supply power to the first output circuit 50 and the second output circuit 60. In the same way, in the event of a normal or faulty battery circuit 30, the static losses of the elevator electrical system 1, i.e. the door motor 62, the system load 65 and the safety circuit 66, are supplied by the charger 10, so that the service life of the battery circuit 30 is increased.

As shown in fig. 4, the switching power distribution circuit 40 includes a fourth switch 44, a first diode 45, and a second diode 46. One end of the fourth switch 44 is connected to the charger 10, the other end of the fourth switch 44 is connected to the battery circuit 30 and the first output circuit 50, the anode of the first diode 45 is connected to the charger 10, the cathode of the first diode 45 is connected to the second output circuit 60, the anode of the second diode 46 is connected to the battery circuit 30, and the cathode of the second diode 46 is connected to the second output circuit 60.

The controller 20 controls the fourth switch 44 to be turned off based on the charge of the battery circuit 30 being in the optimum operating range and the battery circuit 30 operating normally. The battery circuit 30 is connected with the first output circuit 50 to supply power to the first output circuit 50 at low voltage, so as to drive the traction machine 53 to operate by supplying power to the frequency converter 51. The battery circuit 30 is connected to the second output circuit 60 through the second diode 46 to provide low voltage power to the second output circuit 60, thereby providing power to the door motor driver 61 to drive the door motor 62 to operate and to provide power to the system load 65 and the safety loop 66. When the battery circuit 30 is connected to the inverter 51 of the first output circuit 50, energy generated when the hoisting machine 53 operates can be fed back to the battery circuit 30, so that the battery circuit 30 can reuse the fed-back energy, thereby improving the energy saving performance of the elevator electric system 1.

The controller 20 controls the fourth switch 44 to be turned on based on the charge of the battery circuit 30 being below the optimal operating range. The charger 10 is connected to the battery circuit 30 through the fourth switch 44 to provide low voltage power to the battery circuit 30 to charge the battery circuit 30. Therefore, the electric quantity of the battery circuit 30 is monitored in real time, and the fourth switch 44 is controlled to control the charger 10 to charge the battery circuit 30, so that the electric quantity of the battery circuit 30 is always in the optimal working range when the battery circuit 30 works, and the service life of the battery circuit 30 is prolonged.

Based on the abnormal operation of the battery circuit 30, the battery circuit 30 stops supplying power to the first output circuit 50 and the second output circuit 60, and the controller 20 controls the fourth switch 44 to be turned on. The charger 10 is connected to the first output circuit 50 through the fourth switch 44 and to the second output circuit 60 through the first diode 45, and supplies power to the first output circuit 50 and the second output circuit 60 at a low voltage at the same time, drives the traction machine 53 by supplying power to the frequency converter 51, drives the door motor 62 by supplying power to the door motor driver 61, and supplies power to the system load 65 and the safety circuit 66.

In the embodiment, the same power supply device is used for the first output circuit 50 and the second output circuit 60, and the controller 20 controls the fourth switch 44 to enable the charger 10 or the battery circuit 30 to simultaneously supply power to the first output circuit 50 and the second output circuit 60.

In other embodiments, the switching power distribution circuit 40 is also provided with a different number of switches and/or diodes. By setting different connection modes between the switch and/or the diode in the switching power distribution circuit 40 and the charger 10, the battery circuit 30, the first output circuit 50 and the second output circuit 60, the switching power distribution circuit 40 can realize that the charger 10 and/or the battery circuit 30 supplies power for the first output circuit 50 and the second output circuit at low voltage under the control of the controller 20.

Unlike the prior art, the elevator electrical system 1 of the present embodiment includes a charger 10, a controller 20, a battery circuit 30, a switch power distribution circuit 40, a first output circuit 50, and a second output circuit 60, wherein: the charger 10 is connected to the power grid 2 and the switching power distribution circuit 40, the battery circuit 30 is connected to the switching power distribution circuit 40, the switching power distribution circuit 40 is connected to the first output circuit 50 and the second output circuit 60, and the controller 20 is configured to control the switching power distribution circuit 40 to supply power to the charger 10 and/or the battery circuit 30 at a low voltage. Through above-mentioned elevator electrical system 1, through setting up switch distribution circuit 40 and battery circuit 30, charger 10 gets the electricity from electric wire netting 2 to 1 low pressure power supply to elevator electrical system, elevator electrical system 1 is in low pressure power supply state all the time, and then has improved the power consumption safety. Meanwhile, the power supply mode of the first output circuit 50 and the second output circuit 60 can be controlled by controlling the switch power distribution circuit 40, so that the battery circuit 30 is protected, a safety battery and a brake resistor are prevented from being additionally arranged in the system, and the energy saving performance of the system is improved.

Referring to fig. 5, fig. 5 is a schematic structural diagram of a first embodiment of an elevator system 3 according to the present invention. As shown in fig. 5, the elevator system 3 includes an elevator electrical system 1, and the elevator electrical system 1 is the elevator electrical system 1 described in the above embodiments and will not be described again.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims (12)

1. An elevator electrical system comprising a charger, a controller, a battery circuit, a switching power distribution circuit, a first output circuit and a second output circuit, wherein:

the charger is respectively connected with the power grid and the switch power distribution circuit, the battery circuit is connected with the switch power distribution circuit, the switch power distribution circuit is respectively connected with the first output circuit and the second output circuit, and the controller is configured to control the switch power distribution circuit so that the charger and/or the battery circuit are powered by low voltage.

2. The electrical system of claim 1, wherein the controller is communicatively coupled to the charger, the battery circuit, the switching power distribution circuit, the first output circuit, and the second output circuit, respectively.

3. The electrical system of claim 2, wherein the switching power distribution circuit comprises a first switch having one end connected to the charger and another end connected to the battery circuit, the first output circuit, and the second output circuit.

4. The electrical system of claim 3,

the first switch is turned off, the battery circuit is connected with the first output circuit and the second output circuit, and the controller is configured to control the battery circuit to supply power to the first output circuit and the second output circuit at low voltage;

the first switch is conducted, the charger is connected with the first output circuit, the second output circuit and the battery circuit through the first switch, and the controller is configured to control the charger to supply power to the first output circuit and the second output circuit at low voltage or control the charger to supply power to the battery circuit at low voltage so as to charge the battery circuit.

5. The electrical system of claim 2, wherein the switching power distribution circuit further comprises a second switch and a third switch, wherein:

one end of the second switch is connected with the charger, and the other end of the second switch is connected with one end of the third switch and the second output circuit;

one end of the third switch is connected with the second output circuit, and the other end of the third switch is connected with the battery circuit and the first output circuit.

6. The electrical system of claim 5,

the second switch is turned on, the third switch is turned off, the charger is connected with the second output circuit through the second switch, the battery circuit is connected with the first output circuit, and the controller is configured to control the charger to supply power to the second output circuit at low voltage and control the battery circuit to supply power to the first output circuit at low voltage;

the second switch is turned on, the third switch is turned on, the charger is connected with the second output circuit through the second switch, the charger is connected with the battery circuit and the first output circuit through the third switch, and the controller is configured to control the charger to supply low-voltage power to the first output circuit and/or supply low-voltage power to the battery circuit to charge the battery circuit and control the charger to supply low-voltage power to the second output circuit.

7. The electrical system of claim 2, wherein the switching power distribution circuit further comprises a fourth switch, a first diode, and a second diode, wherein:

one end of the fourth switch is connected with the charger, and the other end of the fourth switch is connected with the battery circuit and the first output circuit;

the anode of the first diode is connected with the charger, and the cathode of the first diode is connected with the second output circuit;

the anode of the second diode is connected with the battery circuit, and the cathode of the first diode is connected with the second output circuit.

8. The electrical system of claim 7,

the fourth switch is turned off, the battery circuit is connected with the first output circuit and is connected with the second output circuit through the second diode, and the controller is configured to control the battery circuit to supply power to the first output circuit and the second output circuit at low voltage;

the fourth switch is turned on, the charger is connected with the battery circuit and the first output circuit through the fourth switch and is connected with the second output circuit through the first diode, and the controller is configured to control the charger to supply power to the first output circuit and the second output circuit in a low-voltage mode or control the charger to supply power to the battery circuit in a voltage mode so as to charge the battery circuit.

9. The electrical system of claim 1, wherein the battery circuit includes a battery management device, the battery management device being connected to the controller.

10. The electrical system of claim 1, wherein the first output circuit comprises a frequency converter, a brake supply circuit, and a machine, the frequency converter being coupled to the controller, the switch distribution circuit, and the machine, respectively, and the brake supply circuit being coupled to the switch distribution circuit and the machine, respectively.

11. The electrical system of claim 1, wherein the second output circuit comprises a door motor driver, a door motor, a first switching power supply, a second switching power supply, a system load, and a safety loop, wherein:

the door motor driver is respectively connected with the controller, the switch power distribution circuit and the door motor; the first switching power supply is respectively connected with the switching power distribution circuit and the system load; and the second switching power supply is respectively connected with the switching power distribution circuit and the safety loop.

12. An elevator system, characterized in that it comprises an elevator electrical system, which is an elevator electrical system according to any of claims 1-11.

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