Elevator energy feedback circuit and device based on single chip microcomputer
An energy feedback, single-chip technology, applied in elevators, harmonic reduction devices, transportation and packaging in buildings, etc., can solve the problems of complex control methods, dissipation of excess energy, energy waste, etc.
Pending Publication Date: 2019-07-30
LIUZHOU RAILWAY VOCATIONAL TECHN COLLEGE
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Problems solved by technology
Although this technology can effectively manage and utilize the feedback energy of the elevator, it needs to be combined with the elevator traction control to estimate the energy flow of the elevator, and the control method is relatively complicated.
In addition, when the supercapacitor and the battery pack are fully charged, the elevator is still in the power generation state, and the discharge circuit will be turned on to dissipate excess energy, so some energy will be wasted
Method used
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[0082] 1. The voltage detection circuit 16 transmits the detected DC bus 2.2 voltage to the AD conversion circuit 19, and the AD conversion circuit 19 compares the voltage with the upper limit of the bus voltage and the lower limit of the bus voltage. If the voltage is higher than the upper limit, the AD conversion circuit 19 sends a high level to the port 1 of the single-chip control circuit 10, otherwise it sends a low level; if the voltage is lower than the lower limit, the AD conversion circuit 19 sends Port 2 of the single-chip control circuit 10 sends a high level, otherwise it sends a low level.
[0083] 2. The voltage detection circuit 2 16 transmits the detected terminal voltage of the super capacitor to the AD conversion circuit 2 12, and the AD conversion circuit 2 12 combines this voltage with the upper limit of the super capacitor voltage and the lower limit of the super capacitor Compare. If the voltage is higher than the upper limit or lower than the lower limit, ...
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The invention discloses an elevator energy feedback circuit based on a single chip microcomputer, which is connected between a power grid and an elevator braking unit, wherein the elevator braking unit comprises an elevator frequency converter and an elevator tractor; and the elevator frequency converter comprises a rectification module, a direct current bus and an inversion module, and the rectification module, the direct current bus and the inversion module are electrically connected. According to the invention, a super capacitor and a storage battery pack are used as a hybrid energy storagedevice, a voltage pump on the direct current bus of the frequency converter is detected to ascend or fall, and the single chip microcomputer is used for controlling the super capacitor and the storage battery pack to carry out charging and discharging operation, so that the control method is simplified. In addition, when the condition that the super capacitor and the storage battery are full of electric energy is detected, the elevator is still in a power generation state, the feedback energy of the elevator is directly introduced into a three-phase IGBT inverter bridge circuit and is changedinto alternating current electric energy to be fed back to the power grid, so that the waste of the energy is avoided, and the utilization rate of the feedback energy of the elevator is improved.
Description
Technical field [0001] The invention belongs to the field of energy feedback research, and specifically relates to an elevator energy feedback circuit and device based on a single-chip microcomputer. Background technique [0002] As an important and efficient transportation equipment for high-rise buildings, elevators have gradually become the second largest electrical equipment besides air conditioners. The country now vigorously advocates the establishment of an energy-saving society, and more than 90% of the elevators in use in China are non-energy-saving elevators. Non-energy-saving elevators use energy-consumption braking, that is, the external braking resistor consumes electrical energy, which will quickly heat up the braking resistor and emit smoke or even redness, causing the ambient temperature of the machine room to rise, which will affect the performance of other equipment in the machine room for a long time. normal operation. Therefore, if the energy generated durin...
Claims
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IPC IPC(8): H02J3/32H02J3/38H02J3/01B66B11/04
CPCB66B11/043H02J3/01H02J3/32H02J3/38Y02B50/00Y02E40/40
Inventor 周川姚明阳金丽丽黄斌
Owner LIUZHOU RAILWAY VOCATIONAL TECHN COLLEGE