MEAN WELL VFD Series Bidirectional Power Supply Instruction Manual

: June 17, 2024
: MEAN WELL

MEAN WELL VFD Series Bidirectional Power Supply

Product Information

Specifications

Model: VFD Series
Type: Bidirectional Power Supply
Features: High efficiency, Lightweight, Intelligent

Product Introduction
The VFD series is a three-phase motor drive module that can be used in combination with an external motor control circuit. The product family covers AC or DC input models and two mechanical designs including chassis type and PCB type for different installation requirements. They are suitable for three- phase motors (BLDC, induction motors, synchronous reluctance motor) applications such as fans, water pumps, automatic doors, air conditioners, conveyor belts, and fitness equipment, etc.

Product Usage Instructions

Safety Precautions

Before installation or wiring:
Turn off the power supply.
During operation:
- Do not touch the output voltage, which can be up to 220VAC.
- Note that the product can still hold a high voltage even after turning off the power.

Product Introduction

Model Encoding
The model encoding for the VFD series is as follows:

VFD – 350 – 230
Input rated voltage Appearance: C (Metal case); P (PCB type)
Rated wattage series name

Product Features

Multiple installation options: Chassis type / PCB type
AC and DC input voltage options

Electrical Specification Sheet
Electrical specifications for the VFD series:

Model No.| Voltage Range (UVW)| Output Current| Rated Power| Max. Current| Input Efficiency| Rated Input Voltage| Rated Input Current
---|---|---|---|---|---|---|---
VFD-150P-48| Three phase line-to-line 0~34V, suit for 48V class motor| 4.3A| 150W| 8.6A| 93%| 20 ~ 55VDC| 3.5A / 48VDC Typ.
VFD-250P-48| Three phase line-to-line 0~34V, suit for 48V class motor| 7.2A| 250W| 14.4A| 93%| 20 ~ 55VDC| 5.6A / 48VDC Typ.
VFD-350P-48| Three phase line-to-line 0~34V, suit for 48V class motor| 10A| 350W| 20A| 92.5%| 20 ~ 55VDC| 8.5A / 48VDC Typ.

Note: Typ. stands for typical value.

Installation Instructions

Installation Precautions
Turn off the power supply before installation.
Installation Steps
Follow these steps to install the VFD series:

1. Refer to the mechanical drawings provided in the user manual for the specific installation type (chassis type or PCB type).
2. Ensure that all safety precautions are taken.
3. Connect the VFD series to the external motor control circuit according to the configuration examples provided.

Configuration Examples
Refer to the user manual for configuration examples of the VFD series.

Interface Description

Connector Function Description
The connector functions of the VFD series are described as follows:
PIN8~13 of CN93: PWM control signal input for driving inverter IGBTs
Control Pin Definition
The control pin definitions for the VFD series are as follows:
- TTL input: IGBT ON: High (>2.6V); IGBT OFF: Low (3V); Abnormal: Low (3V)
- PF>0.99/115VAC, PF>0.93/230VAC

Function Description

Three-phase, Six-switch IGBT Control Setting
The VFD series supports three-phase, six-switch IGBT control setting.
Three-phase Current Detection and Over-current Protection
The VFD series provides three-phase current detection and over-current protection.
DC Bus Voltage Detection
The VFD series features DC bus voltage detection.
IGBT Temperature Monitoring
The VFD series includes IGBT temperature monitoring.
Driver Error Alarm
The VFD series has a driver error alarm function.

Abnormal Conditions and Troubleshooting
Refer to the user manual for information on abnormal conditions and troubleshooting for the VFD series.

Warranty
The VFD series comes with a warranty. Refer to the user manual for warranty details.

INTRODUCTION

The VFD series is a three-phase motor drive module that can be used in combination with an external motor control circuit. The product family covers AC or DC input models and two mechanical design including chassis type and PCB type for different installation requirement. They are suitable for three-phase motors (BLDC, induction motors, synchronous reluctance motor) applications such as fans, water pumps, automatic doors, air conditioners, conveyor belts, and fitness equipment, etc.

Safety Precautions

Turn off the power supply before installation or wiring.
The output voltage is up to 220VAC , do not touch it during operation.
The product can still hold an high voltage after turning off the power supply. Do not touch any parts on the product immediately to avoid danger. You can wait for 1 minute or take the initiative to unload the residual energy in the bulk capacitor before any further setting.
The output AC terminal UVW cannot be connected to the AC power supply source.
This product is used for three-phase motor loads and cannot be configured with single-phase motors or used for other purposes.
Only qualified professional technician can install, wire, repair and perform maintenance to the driver.
The product is non-isolated type. When connecting the functional connector, please note that the AC FG power supply for external signals should be removed or properly isolated to avoid damage.
Do not put in or out the motor during operation to avoid overcurrent tripping or damage to the driver.

Product introduction

Model Encoding

Product Features

Multiple installation options: Chassis type / PCB type
AC and DC input voltage options :
- AC input type (built-in PFC function) : 90~264Vac
- DC input type : 20~55Vdc
Fanless design for no noise and long product life cycle
Can be controlled with external controller
High surge current 200% up to 5 seconds
Equipped with basic protection functions: short circuit and overcurrent protection
Provided multiple sensors for external control:
Current sensor: can be used in motor torque control DC bus voltage sensor: can be used for over / under voltage protection
Temperature sensor: can be used for over-temperature protection
30~+70 ℃ wide operating temperature range
Suitable for three-phase motor load applications brushless DC motor(/induction motor synchr/onous reluctance motor …)
3 years warranty

Electrical Specification Sheet

DC Input PCB Type (for 48V Motor)

AC Input PCB Type (for 230V Motor)

AC Input Chassis Type (for 230V Motor)

Derating Curves

Derating Curve vs Ambient Temperature (PCB Type)

Derating Curve vs Ambient Temperature (Chassis Type)

Output Derating vs Input Voltage

Mechanical Drawings

VFD-150P-48 /VFD-250P-48/VFD-350P-48

VFD-250P-230 /VFD-350P-230

VFD-200C-230 /VFD-350C-230

VFD-750C-230

Installation Instructions

Installation Precautions

Do not use the product in high temperature or high humidity environment to avoid failure or affecting the lifetime of the VFD driver product.
VFD series products are with fan-less design. Pay attention to the derating curve for the installation environment and operating power to avoid driver entering protection mode or damaged.

Installation Steps

Select appropriate wires to connect the VFD , power supply and motor load according to the rated current on specification.
The terminals must be connected correctly. The wire connecting between the VFD and motor must follow correct sequence of the UVW phase to avoid steering errors or operational failures.

Configuration Examples

VFD series system block diagram
- AC input type： VFD-250P-230/ VFD-350P-230/ VFD-200C-230/VFD-350C-230
- AC input type： VFD-750C-230
- DC input type： VFD-150P-48/ VFD-250P-48/ VFD-350P-48
Application configuration example (BLDC motor application )

1. The figure below shows a typical configuration of VFD series products used in BLDC motor drives.
2. Developers can make own design on the external control boards and use them with the VFD series products to achieve motor control applications.
3. The external control board should generate 3 phase PWM signal to the the six-switch on the VFD series (PWM_UH/UL/VH/VL/WH/WL , PIN8~13) . The VFD series provide three-phase current / DC bus voltage /temperature feedback signals, by means of OPA or voltage divider, for the external control board to detect the motor behavior and generate motor control signal.
4. In certain cases, there are position sensors (Hall-effect sensor or Encoder … ) in the motor to feedback motor status for controlling. If you need a control card with sensor input ports, please contact MEAN WELL for optional control boards.
5. In order to avoid damage to the driver, over-voltage protection should be provided by the system to avoid damage to the VFD product. The maximum DC bus voltage is 420V for the AC input models or 60V for the DC input models .
6.  If there is a need for a regenerative braking circuit, connect the regenerative braking circuit to the DC + and DC – pins to avoid ‘overvoltage on the driver s DC bus due to motor regenerative power.

AC input type： VFD-250P-230/ VFD-350P-230/ VFD-200C-230/VFD-350C-230/ VFD-750C-230

DC input type： VFD-150P-48/ VFD-250P-48/ VFD-350P-48

Interface Description

Connector Function Description

A Input connection terminals:
Connect the appropriate power supply according to the input specification (230V or 48V models) .
B Three-phase output connection terminals:
Three-phase voltage output terminal, typically connected to three-phase motors .
C DC bus output connection terminals (230 type only):
The DC bus voltage output is used to connect the external regenerative brake circuit. If required, the 48 type can be configured directly at the input connection terminals .
D CN93 control pin terminals:
Functional/Control pins to be connected to the external control boards, please refer to Section 5 for more detail .

Control Pin Definition

Function Description

Three-phase, Six-switch IGBT Control Setting
The VFD series products have internally 3 sets of half-bridge IGBT in parallel which forms three-phase, six-switch circuits. The 6 IGBTs are controlled by input signals PWM_UH/PWM_UL/PWM_VH/PWM_VL/PWM_WH/PWM_WL respectively (PIN8~13) . Input signal electrical level is compatible with TTL and CMOS 3.3V controller signals. Recommended wiring is as follows.

Note that simultaneous activation on the high-side (H) and the low-side (L) switches on the same phase is prohibited. A switching control signals dead- time (t (Min.)) of 300ns or above is required.

Three-phase Current Detection and Over-current Protection

The VFD series products have three built-in current shunt resistors placed to the three phase low-side circuit loop respectively. This signal can be used for internal over-current protection of the VFD product and provided to external controller for current detection. The recommended connection for this signal is as short as possible and better to OPA for the readout circuit to obtain the best detection results.
When the output is in overcurrent state due to abnormal condition such as short circuit, the VFD’s built-in overcurrent detection circuit will trigger ITRIP signal and turn off the Gate driver to protect the VFD product hardware. ITRIP signal is triggered when output current is higher than 200% rated current.

DC Bus Voltage Detection
The VFD products have built-in DC bus voltage detection signal – HV+ sensor . This signal level is correspond to the DC bus voltage level. When DC bus is at 380V (for AC models) or 48V (for DC models) the HV+ sensor will be at 2.5V. Similar to the current detection circuit suggestions, it is recommended to use an OPA circuit for the readout for the HV+ sensor signal. To avoid product damage, when the detected voltage is higher than 420V (for AC models) or 60V (for DC models), it is recommended to turn off the PWM switch and/or design a regenerative braking resistor circuit to absorb the regenerative power.

IGBT Temperature Monitoring
The VFD product has built-in NTC resistor or temperature sensor for detecting the temperature of the IGBT component. This signal can be used for the users to design the control or protection functions for the IGBTs. The recommended circuits are as follows :

VFD-150P-48/ VFD-250P-48/ VFD-350P-48/ VFD-250P-230/VFD-350P-230/ VFD-200C-230/ VFD-350C-230:
**VFD-750C-230:

**

**Recommended NTC TSM2A103F34D1RZ specification sheet：

**

Driver Error Alarm
When an overcurrent condition occurs in the VFD product, the FAULT signal will be enabled (active-low) . When the overcurrent duration longer than T , FAULT signal will trigger an action and Tripmin. notify the external control circuit that an error occurs in the VFD driver.

Abnormal Conditions and Troubleshooting

If the fault still cannot be eliminated, please contact MEAN WELL or a MEAN WELL dealer for further support.

Warranty

If the products are used under limits and according to the specifications, one can enjoy 5 years warranty with free repair service. Please do not replace parts or perform any form of modification or repair on this product by yourself, so as not to affect your right to enjoy normal warranty services.
MEAN WELL reserves the right to revise the user manual. If there is any revision, please refer to the MEAN WELL official website for information . https://www.meanwell.com