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In the title compound, [Cu(SO4)(C15H11N5)(H2O)]·CH3OH·2H2O, the CuII ion is in a distorted square-pyramidal geometry, in which three N atoms from the chelating 1-(1,10-phenanthrolin-2-yl)-1H-pyrazol-3-amine ligand and one O atom from a sulfate anion define the basal plane and the O atom from the coordinating water molecule is located at the apex. In the crystal, hydrogen-bonding interactions involving the coordinating and solvent water molecules, the methanol solvent molecule and the amine group (one with an intramolecular interaction to one of the sulfate O atoms) of the complex are observed. π–π interactions between symmetry-related phenantroline moieties, with a shortest centroid–centroid interaction of 3.573 (2)°, are also present.

The control system used in air compressor driven by brushless direct current (BLDC) motor was designed in this paper. Based on the analysis of resistance characteristic of air compressor and direct torque control method, a simple open loop control method used to change duty ratio was provided. Simulation and experiment showed that the fluctuation of Rotational speed had been sharply reduced and the opposing torque output had almost disappeared when different duty ratio in different operational position to drive the BLDC MOTOR was adopted. In that way the air compressor can work more stably without disturbance from opposing torque, which provides the motor with high efficiency as well as sparing cost and reducing the size of system.

In the title compound, [Cu(SO(4))(C(15)H(11)N(5))(H(2)O)]·CH(3)OH·2H(2)O, the Cu(II) ion is in a distorted square-pyramidal geometry, in which three N atoms from the chelating 1-(1,10-phenanthrolin-2-yl)-1H-pyrazol-3-amine ligand and one O atom from a sulfate anion define the basal plane and the O atom from the coordinating water mol-ecule is located at the apex. In the crystal, hydrogen-bonding inter-actions involving the coordinating and solvent water mol-ecules, the methanol solvent mol-ecule and the amine group (one with an intra-molecular inter-action to one of the sulfate O atoms) of the complex are observed. π-π inter-actions between symmetry-related phenantroline moieties, with a shortest centroid-centroid inter-action of 3.573 (2)°, are also present.