Patent ID: 7599172

Claim:
An electronic speed controller comprising: a cabinet including an inverter, static switches, and an electronic control/command assembly, wherein said static switches are included in said inverter and said electronic control/command assembly operates said static switches so that said inverter delivers an adjustable regulated polyphase AC current to be delivered to a load; a display and dialogue module; a control bus connector configured to link said display and dialogue module to the electronic control/command assembly so as to control said electronic control/command assembly based on inputs received with said display and dialogue module; and an add-on electronic module fitting between said display and dialogue module and a face of said cabinet, wherein said display and dialogue module has a removable lid configured to allow access to said add-on electronic module, wherein the control bus connector is configured to directly connect either to (i) the display and dialogue module or to (2) at least one option module including a through connector with a rear part directly connected to the control bus connector and a front part directly connected to either the display and dialogue module or a rear part of a through connector of another option module, and wherein a first option module is disposed between said control bus connector and said display and dialogue module, and wherein said first option module is shaped such that said add-on electronic module is accessible via said removable lid.