User:Tknbeez/ENES-100/project 2/CDIO

Problem Statement
Examine the wheel chair speed controller

Designing the Implementation Process
Find out and label the function of the wires by taking notes from previous team and follow [old document] Open up the speed controller to see how the wires are connected

Designing the Implementation Process
Look up the letters on the chip online and found out this speed controller is similar to the VR2 power module from PG Drives Technology

The power module comes with a set consists of itself and the joystick module. However there is also an optional Duel attendant control

The power Module can be populated to drive 1 or 2 seat actuators. Each output channel has a 12A capability and automatic end-stop detection, meaning there is no need to fit expensive and potentially unreliable limit switches. This Power Module also has a high power connector which can be safely used for chargin even large capacity batteries. Its universal inhibit pin can be set up for compatibility with any type of charger inhibit output. A second inhibit connection is also provided and can be used wherever there is a need to limit the speed or prevent the drive of the wheelchair. Each of these inhibits can be programmed independently, with each offering four different programmable speed levels depending on the state of the inputs. This unique flexibility is further enhanced by innovative, new actuator interlocking functions, whereby the VR@ can be programmed to lock out movements of either actuator in either or both directions, in response to switches or potentiometers connected to one or both of the inhibit inputs.

Specifications

Supply Voltage: 24Vdc

Operating voltage: 16Vdc to 28Vdc

Peak Voltage: 38 Vdc

Reverse battery voltage: 40Vdc

Drive current: 60A

70A

PWM Frequency: 20kHz

Brake Voltage: Programmable, 12Vdc or 24Vdc

Brake Current: 1A max. per brake

Battery Charging Current: 12Arms max

JSM Charger Connector: Use Neutrik NC3MX

Pm Charger Connector: USE PG D50725

Actuator Current: 12A max

Moisture Resistance: IPX4

Safety: Multiple hardware & software strategy

Designed to ISO7176/14

Operating temperature: -25 Celsius Degree to 50 Celsius Degree

Storage temperature: -40 Celsius Degree to 65 Celsius Degree

EMC on sample powerchair Susceptibility: Tested at 30V/m to ENI12184 and ANSI/RESNA requirements

Emissions: To EN5022 class B

ESD: IEC801 part 2

Test, Verification, Validation, and Certification
The purpose of this project is to build a electronic wheel chair that can be control by a joystick. The controller should be able to control the speed well and the wheel chair should be able to move in all directions. Pretty much like this video [Autonomous Wheel Chair]

Implementation Management
The first step is just as simple as examining the speed controller so there are no problem so far. However the next steps would be very complicated and difficult building up a speed controller for a big wheel chair requires a lot of works and efforts. Should start working on connecting the arduino with the speed controller following the tutorials in the old documents