Elevator Inverter

AS320 elevator inverter is a kind of newly developed frequency inverter especially for elevators. It is designed with 32-bit MPU for motor driving, high performance complex programmable logic device (CPLD), and advanced power module. Meanwhile, the elevator inverter is designed based on international advanced closed loop vector control technology and supports various control modes including V/F control, sensorless vector control, and torque control modes. Integrating the characteristics of potential energy load, the elevator inverter allows elevators to operate efficiently, smoothly and steadily, and offers passengers a comfortable feeling.

The elevator inverter is designed based on innovative load-sensorless start compensation technology, which helps ensure comfortable feeling at the starting moment without installation of a weight measuring device. Meanwhile, incremental ABZ encoder is utilized to achieve control of the synchronous motor. In addition, new type PWM inverter dead time compensation method and dynamic PWM carrier modulation technology help effectively reduce the noise and losses in electric motors. By making improvement on inverter hardware, our elevator inverters offer a maximum junction temperature of 175℃ and low switch loss.

Main Features
1. Closed loop vector control technology ensures high performance.
2. Zero-speed torque compensation without load weighing device helps to save cost.
3. New PWM dead-zone compensation technology of the elevator inverter results in less energy loss.
4. Dynamic PWM carrier modulation technology for less motor noise.

Model List of the Elevator Inverter
Model Rated capacity (kVA) Rated output current (kA) Applicable motor power (kW)
2S01P1 2.3 6.0 1.1
2S02P2 4.6 12 2.2
2S03P7 6.9 18 3.7
4T02P2 4.7 6.2 2.2
4T03P7 6.9 9 3.7
4T05P5 8.5 13 5.5
4T07P5 14 18 7.5
4T0011 18 27 11
4T0015 24 34 15
4T18P5 29 41 18.5
4T0022 34 48 22
4T0030 50 65 30
4T0037 61 80 37
4T0045 74 97 45
4T0055 98 128 55
4T0075 130 165 75

Technical Specifications of the Elevator Inverter

Item Technical index
Max. output voltage (V) Three phase, 380/400/415/440/460V
Input power supply Phase number, voltage, frequency Three-phase, 380/400/415/440/460V 50/60Hz
Allowable voltage change -15% ~ +10%
Allowable frequency change -5% ~ +5%
Elevator inverter operation condition when voltage dips When voltage is AC300V or above: operate continuously When the rated input voltage drops to a voltage below AC300V: under-voltage protection is available in 15ms.
Control characteristic Control mode Vector control with PG card V/F control Open loop vector control Torque control
Starting torque 150%: 0Hz (PG card vector control) 120%: 0.5Hz (V/F control) 150%: 0.5Hz (open loop vector control)
Speed control range 1:1000 (vector control with PG card) 1: 200 ( vector control without PG card)
Speed control precision ±0.02% (vector control with PG card, 25 ±10 ℃); ±0.2% (vector control without PG card 25 ±10 ℃)
Torque limitation Available through parameter setting
Torque precision ±5%
Frequency control range 0 ~ 120Hz
Frequency precision (temperature fluctuation ) ±0.01% (Digital command, -10 ~+45℃ ) ±0.1% (Analog command, 25 ±10 ℃)
Preset frequency resolution 0.01Hz (Digital command) ±0.06Hz/120Hz (Analog command, 11bit + unsigned)
Output frequency resolution 0.01Hz
Overload capacity Zero speed: 150% , < 3Hz: 160%, > 3Hz: 200%
Braking torque 150% (external brake resistor), built-in brake unit
Acceleration / deceleration time 0.01 ~ 600s
Carrier frequency 2 ~ 11kHz
Speed setting Digital setting, analog setting, control panel setting
Storage battery operation If power failure occurs, the elevator inverter allows the elevator to work on storage batteries at a low speed, thus enabling the elevator to stop at the nearest floor
PG card interface signal PG-card power supply 5V, 12V, 300mA
PG-card signal type Open collector, push-pull, differential, SIN/COS, Endat absolute types
PG-card frequency divided output OA and OB orthogonal, dividing frequency coefficient: 1-128
Control signal input/output Analog voltage input 2 input channels, -10 ~ +10VDC, precision 0.1%
Analog voltage output 2 output channels, -10 ~ +10VDC, precision 0.1%
Opto-isolator input 8 input channels, input function is user-defined
Open collector output 4 output channels, output function is user-defined
Programmable relay output 2 output channels, normally open and closed contacts are available; Contact capacity: resistance: 5A 250VAC or 5A 30VDC Output function is user-defined
RS485 communication signal 1-channel,
RS232 communication interface 1-channel, used for connection to control system or PC
Protection functions Motor overload protection The function is available through parameter setting
Elevator inverter overload protection < 3Hz: 160%, 5 seconds > 3Hz : 185%, 10 seconds
Short circuit protection Protect the elevator against over-current caused by short circuit of any two output phases
In-operation input phase loss protection During operation, if there is input phase loss, output is stopped to protect the elevator inverter
In-operation output phase loss protection During operation, if there is output phase loss, output will be stopped to protect the elevator inverter
Over-voltage threshold Bus voltage 410V(200V series), 810V(400V series)
Under-voltage threshold Bus voltage 180V (200V series), 380V(400V series)
Instantaneous power off compensation Protection over 15ms
Overheat of radiation fins Protection is available through thermistor
Speed loss protection Available when the operation speed variation is over 30% of rated speed
Impulse encoder failure protection Disconnect PG
Braking unit protection Automatic diagnosis of braking unit failures, and then give protections
Module protection Include overcurrent, short circuit and overheat protections
Current sensor protection Auto detect when powered on
Reversed-speed protection Detect through encoder
I ²t protection Detect through 3-phase current
Over-high input voltage protection 400V series: > 725V 200V series: >360V Detect when stopped
Output ground fault protection If there is any short circuit to ground during operation, the output will be stopped to protect the elevator inverter
Output unbalance protection If there is unbalanced output current, the output will be stopped to protect the elevator inverter
Short circuit protection for brake resistor Detect while braking
Encoder interference Evaluate the encoder interface degree and alarm
EEPROM failure Detect when powered on
Display LCD display All sub-menus
Operation environment Ambient temperature -10 - +45℃
Humidity 95%RH or below (no condensing)
Storage temperature -20 ~ +60℃ (storage during short term transportation)
Application places Indoor (without corrosive gas and heavy dust)
Altitude 1000m or lower
Structure Protection class IP20
Cooling method Forced air cooling
Installation method In cabinet

We are a major elevator inverter manufacturer and supplier in China. We offer various types of products such as general vector inverter, elevator group control system, energy regenerator and car controller board.

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Inquiry Form

Add.: No.599, Meiyu Road, Jiading District, Shanghai, 201802, China.
Fax: +86-21-31010649
Tel.: +86-21-31010610
E-mail: overseas@stepelectric.com