casuprock
10+ Year Contributor
- 320
- 3
- Apr 13, 2010
-
Exeter,
New_Hampshire
Starting a writeup about this project to document the work in a new thread dedicated to the controller. The HE351VE controller is designed to position the vanes and keep the compressor in an optimal condition. The HE351VE uses a BLDC motor in the OEM control. I will be using a linear actuator (FA-PO-150-12-2") for the first version of this controller.
The objective is to create something that can be interfaced externally to anything with 5V logic (like an AEM ecu) or to any device capable of communicating through I2C. Digital expansion means I can collect information from any type of sensor necessary to make the system better. The controller also has analog inputs for a variable reluctance (shaft speed) sensor and pressure sensor. This thread will be edited as the controller is developed since I'm sure there will be revisions moving forward. Schematics will be posted after the circuits are tested.
Inputs
- 0-5V Analog potentiometer position input
- 0-5V Differential VR Sensor input ~0 to 300000 RPM
- 0-5V Analog pressure sensor input
- Vin (12-14.5V)
Outputs
- 5V analog supply
- 0-Vin (0-14.5V) PWM motor output
Digital IO
- I2C compatible
- 5V logic
Processor
- ATMEGA48
Basic controller concept
Here is a picture of the controller, before PCB trace routing.
The basic control idea is already defined by Holset:
The objective is to create something that can be interfaced externally to anything with 5V logic (like an AEM ecu) or to any device capable of communicating through I2C. Digital expansion means I can collect information from any type of sensor necessary to make the system better. The controller also has analog inputs for a variable reluctance (shaft speed) sensor and pressure sensor. This thread will be edited as the controller is developed since I'm sure there will be revisions moving forward. Schematics will be posted after the circuits are tested.
Inputs
- 0-5V Analog potentiometer position input
- 0-5V Differential VR Sensor input ~0 to 300000 RPM
- 0-5V Analog pressure sensor input
- Vin (12-14.5V)
Outputs
- 5V analog supply
- 0-Vin (0-14.5V) PWM motor output
Digital IO
- I2C compatible
- 5V logic
Processor
- ATMEGA48
Basic controller concept
Here is a picture of the controller, before PCB trace routing.
You must be logged in to view this image or video.
The basic control idea is already defined by Holset:
You must be logged in to view this image or video.