Solar Direct-Drive Compressor Control Without Battery Banks
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Solution Overview
Problem
Traditional photovoltaic power supply systems for remote locations are disadvantaged by the costs and weight of battery banks, and the challenges of battery maintenance and availability, necessitating a simpler system without batteries.
Innovation Solution
A direct drive method and system for motors driving a piston compressor pump, powered directly from a photovoltaic module, with adjustable speed based on available power, and an integrated controllable switching arrangement to manage power input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional photovoltaic power supply system with battery bank is used, then power can be stored for later use, but the system becomes costly and heavy
Solution Approach 1:
The patent removes the battery bank from the photovoltaic power supply system, extracting the energy storage component that causes weight and cost issues. The system operates by directly powering the motor from the photovoltaic panels when sufficient power is available, eliminating the need for heavy battery storage while maintaining core functionality.
Solution Approach 2:
The system dynamically adjusts motor operation based on real-time power availability from the photovoltaic panels. The control unit continuously monitors power generation and adjusts motor starting and operation accordingly, enabling the system to adapt to varying solar conditions without requiring fixed energy storage capacity.
2Reliability
If a traditional photovoltaic power supply system with battery bank is used, then power can be stored for later use, but the system complexity increases
Solution Approach 1:
The patent removes the battery bank and associated charge control circuitry from the system, significantly reducing structural complexity. The simplified architecture consists of photovoltaic panels directly connected to a motor through a control unit that monitors power availability, eliminating multiple components and interconnections required for battery-based systems.
Solution Approach 2:
The control unit integrates multiple functions into a single device: it monitors photovoltaic power output, determines motor starting conditions, controls motor operation, and manages the transition between operating states. This functional consolidation reduces the number of separate components and simplifies the overall system architecture.
3Use of energy by moving object
If the motor is frequently started and stopped to match power availability, then energy efficiency improves, but motor wear increases
Solution Approach 1:
The control unit continuously monitors the power output from the photovoltaic panels and uses this feedback to make real-time decisions about motor operation. When sufficient power is detected, the motor is started and maintained; when power becomes insufficient, the motor is stopped. This feedback-based control optimizes energy usage while managing motor wear through intelligent operation timing.
Solution Approach 2:
The system performs preliminary assessment of power availability before starting the motor. The control unit evaluates whether sufficient power is present from the photovoltaic panels before initiating motor operation, preventing premature starts that would waste energy or cause excessive wear. This preliminary check ensures optimal timing for motor activation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach eliminates the need for costly battery banks, reduces motor wear by minimizing starts and stops, and ensures continuous operation for maximum cooling, suitable for remote locations with unreliable AC power grids.
Implementation Method 1
a photovoltaic module, wherein the motor is adapted to drive a piston compressor pump... determining an available amount of power from the photovoltaic module
Data Source
AI summary
The present invention relates to a method for powering a motor directly from a photovoltaic module, wherein the motor is adapted to drive a piston compressor pump, the method comprising the steps of determining an available amount of power from the photovoltaic module, and starting the motor if the available amount of power exceeds a predetermined power level, repeatedly determining, within a predetermined time period, an available amount of power from the photovoltaic module while operating the motor, and adjusting the speed of rotation of the motor in accordance with the repeatedly determined available amount of power. The present invention also relates to a power unit for powering a motor directly from a photovoltaic module, and to a cooling device for cooling pharmaceuticals.