Method for driving an actuator of an hvac system
AssigneeJohnson Electric S.A.
InventorYvan BOURQUI
Life of this patent
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Abstract
A method for driving an actuator of an HVAC system is provided, and which comprises the steps of: a] determining an actuation command to the actuator; and b] ramping a drive power to the actuator between a steady-state-velocity drive power and a zero-velocity drive power to effect a required acceleration or deceleration to a movable member of the HAVC system without or substantially without over-powering of the actuator. An HVAC system is also provided. The HVAC system implementing the above method is not only capable of reducing the noise produced by an HVAC system, but is also capable of reducing an over-powering of the actuator when there is a low load on the system.
Claims20
A method for driving an actuator of an HVAC system, the method comprising the steps of:
- a] deter mining an actuation command to the actuator;
- and
- b] ramping a drive power to the actuator between a steady-state-velocity drive power and a zero-velocity drive power to effect a required acceleration or deceleration to a movable member of the HAVC system without or substantially without over-powering of the actuator.
A method for driving an actuator of an HVAC system, the method comprising the steps of:
- a] determining a region of mechanical play in a movable member of the HVAC system which is associated with the actuator;
- b] monitoring a position of the movable member or at least one rotatable element of the actuator to detetiiiine when the region of mechanical play has been entered or exited;
- and
- c] ramping a drive power to the actuator between a steady-state-velocity drive power and a zero-velocity drive power during the region of mechanical play so as to eliminate or reduce over-powering of the actuator.
An HVAC system comprising:
- an actuator having an actuator position sensor associated therewith;
- at least one HVAC vent flap connected to the actuator via a movable member, the motion of the movable member having a region of mechanical play therein;
- a controller for controlling the actuator;
- and
- a memory circuit associated with the controller and arranged to store information of the region of mechanical play;
- the controller being adapted to ramp a drive power to the actuator between a steady-state-velocity drive power and a zero-velocity drive power when the actuator position sensor determines that the motion of the movable member is within the region of mechanical play.
Dependencies are inferred from the claim text.