def testGeneratorSimple(self):
inputs = {}
outputs = {}
myobj = dc.GeneratorSimple(direct_drive=True, n_pc=20)
inputs["rotor_diameter"] = 200.0
inputs["machine_rating"] = 10e3
inputs["rated_torque"] = 10e6
inputs["lss_rpm"] = x = np.linspace(0.1, 10.0, 20)
inputs["L_generator"] = 3.6 * 1.5
inputs["generator_mass_user"] = 0.0
inputs["generator_radius_user"] = 0.0
inputs["generator_efficiency_user"] = 0.0
myobj.compute(inputs, outputs)
self.assertEqual(outputs["R_generator"], 1.5)
m = 37.68 * 10e3
self.assertEqual(outputs["generator_mass"], m)
self.assertEqual(outputs["generator_rotor_mass"], 0.5 * m)
self.assertEqual(outputs["generator_stator_mass"], 0.5 * m)
npt.assert_equal(
outputs["generator_I"], m * np.r_[0.5 * 1.5 ** 2, (3 * 1.5 ** 2 + (3.6 * 1.5) ** 2) / 12 * np.ones(2)]
)
npt.assert_equal(outputs["generator_rotor_I"], 0.5 * outputs["generator_I"])
npt.assert_equal(outputs["generator_stator_I"], 0.5 * outputs["generator_I"])
eff = 1.0 - (0.01007 / x * x[-1] + 0.02 + 0.06899 * x / x[-1])
eff = np.maximum(1e-3, eff)
npt.assert_almost_equal(outputs["generator_efficiency"], eff)
myobj = dc.GeneratorSimple(direct_drive=False)
myobj.compute(inputs, outputs)
self.assertEqual(outputs["R_generator"], 1.5)
m = np.mean([6.4737, 10.51, 5.34]) * 10e3 ** 0.9223
self.assertEqual(outputs["generator_mass"], m)
self.assertEqual(outputs["generator_rotor_mass"], 0.5 * m)
self.assertEqual(outputs["generator_stator_mass"], 0.5 * m)
npt.assert_equal(
outputs["generator_I"], m * np.r_[0.5 * 1.5 ** 2, (3 * 1.5 ** 2 + (3.6 * 1.5) ** 2) / 12 * np.ones(2)]
)
npt.assert_equal(outputs["generator_rotor_I"], 0.5 * outputs["generator_I"])
npt.assert_equal(outputs["generator_stator_I"], 0.5 * outputs["generator_I"])
eff = 1.0 - (0.01289 / x * x[-1] + 0.0851 + 0.0 * x / x[-1])
eff = np.maximum(1e-3, eff)
npt.assert_almost_equal(outputs["generator_efficiency"], eff)
eff = np.linspace(0.5, 1.0, 20)
inputs["generator_efficiency_user"] = np.c_[x, eff]
myobj.compute(inputs, outputs)
npt.assert_almost_equal(outputs["generator_efficiency"], eff)
inputs["generator_mass_user"] = 2.0
inputs["generator_radius_user"] = 3.0
myobj.compute(inputs, outputs)
self.assertEqual(outputs["R_generator"], 3.0)
self.assertEqual(outputs["generator_mass"], 2.0)
self.assertEqual(outputs["generator_rotor_mass"], 1.0)
self.assertEqual(outputs["generator_stator_mass"], 1.0)
npt.assert_equal(outputs["generator_rotor_I"], 0.5 * outputs["generator_I"])
npt.assert_equal(outputs["generator_stator_I"], 0.5 * outputs["generator_I"])
def setup(self):
opt = self.options["modeling_options"]["WISDEM"]["DriveSE"]
n_dlcs = self.options["n_dlcs"]
direct = opt["direct"]
dogen = self.options["modeling_options"]["flags"]["generator"]
n_pc = self.options["modeling_options"]["WISDEM"]["RotorSE"]["n_pc"]
self.set_input_defaults("machine_rating", units="kW")
self.set_input_defaults("planet_numbers", [3, 3, 0])
self.set_input_defaults("gear_configuration", "eep")
self.set_input_defaults("hvac_mass_coeff", 0.025, units="kg/kW/m")
# self.set_input_defaults('mb1Type', 'CARB')
# self.set_input_defaults('mb2Type', 'SRB')
self.set_input_defaults("uptower", True)
self.set_input_defaults("upwind", True)
self.set_input_defaults("n_blades", 3)
# Materials prep
self.add_subsystem(
"mat",
DriveMaterials(
direct=direct,
n_mat=self.options["modeling_options"]["materials"]["n_mat"]),
promotes=["*"],
)
# Need to do these first, before the layout
self.add_subsystem("hub",
Hub_System(modeling_options=opt["hub"]),
promotes=["*"])
self.add_subsystem("gear",
Gearbox(direct_drive=direct),
promotes=["*"])
# Layout and mass for the big items
if direct:
self.add_subsystem("layout", lay.DirectLayout(), promotes=["*"])
else:
self.add_subsystem("layout", lay.GearedLayout(), promotes=["*"])
# All the smaller items
self.add_subsystem("bear1", dc.MainBearing())
self.add_subsystem("bear2", dc.MainBearing())
self.add_subsystem("brake",
dc.Brake(direct_drive=direct),
promotes=["*"])
self.add_subsystem("elec", dc.Electronics(), promotes=["*"])
self.add_subsystem("yaw",
dc.YawSystem(),
promotes=[
"yaw_mass", "yaw_I", "yaw_cm", "rotor_diameter",
"D_top"
])
# Generator
self.add_subsystem("rpm", dc.RPM_Input(n_pc=n_pc), promotes=["*"])
if dogen:
gentype = self.options["modeling_options"]["WISDEM"][
"GeneratorSE"]["type"]
self.add_subsystem(
"generator",
Generator(design=gentype, n_pc=n_pc),
promotes=[
"generator_mass",
"generator_cost",
"generator_I",
"machine_rating",
"generator_efficiency",
"rated_torque",
("rotor_mass", "generator_rotor_mass"),
("rotor_I", "generator_rotor_I"),
("stator_mass", "generator_stator_mass"),
("stator_I", "generator_stator_I"),
],
)
else:
self.add_subsystem("gensimp",
dc.GeneratorSimple(direct_drive=direct,
n_pc=n_pc),
promotes=["*"])
# Final tallying
self.add_subsystem("misc", dc.MiscNacelleComponents(), promotes=["*"])
self.add_subsystem("nac", dc.NacelleSystemAdder(), promotes=["*"])
self.add_subsystem("rna", dc.RNA_Adder(), promotes=["*"])
# Structural analysis
self.add_subsystem("lss",
ds.Hub_Rotor_LSS_Frame(n_dlcs=n_dlcs,
modeling_options=opt,
direct_drive=direct),
promotes=["*"])
if direct:
self.add_subsystem("nose",
ds.Nose_Stator_Bedplate_Frame(
modeling_options=opt, n_dlcs=n_dlcs),
promotes=["*"])
else:
self.add_subsystem("hss",
ds.HSS_Frame(modeling_options=opt,
n_dlcs=n_dlcs),
promotes=["*"])
self.add_subsystem("bed",
ds.Bedplate_IBeam_Frame(modeling_options=opt,
n_dlcs=n_dlcs),
promotes=["*"])
# Output-to-input connections
self.connect("bedplate_rho", ["pitch_system.rho", "spinner.metal_rho"])
self.connect("bedplate_Xy", ["pitch_system.Xy", "spinner.Xy"])
self.connect("bedplate_mat_cost", "spinner.metal_cost")
self.connect("hub_rho", ["hub_shell.rho", "rho_castiron"])
self.connect("hub_Xy", "hub_shell.Xy")
self.connect("hub_mat_cost", "hub_shell.metal_cost")
self.connect("spinner_rho",
["spinner.composite_rho", "rho_fiberglass"])
self.connect("spinner_Xt", "spinner.composite_Xt")
self.connect("spinner_mat_cost", "spinner.composite_cost")
if direct:
self.connect("D_bearing1", "bear1.D_bearing")
self.connect("D_bearing2", "bear2.D_bearing")
self.connect("bear1.mb_mass", "mb1_mass")
self.connect("bear1.mb_I", "mb1_I")
self.connect("bear1.mb_max_defl_ang", "mb1_max_defl_ang")
self.connect("s_mb1", "mb1_cm")
self.connect("bear2.mb_mass", "mb2_mass")
self.connect("bear2.mb_I", "mb2_I")
self.connect("bear2.mb_max_defl_ang", "mb2_max_defl_ang")
self.connect("s_mb2", "mb2_cm")
self.connect("bedplate_rho", "yaw.rho")
self.connect("s_gearbox", "gearbox_cm")
self.connect("s_generator", "generator_cm")
if dogen:
self.connect("generator.R_out", "R_generator")
self.connect("bedplate_E", "generator.E")
self.connect("bedplate_G", "generator.G")
if direct:
self.connect("lss_rpm", "generator.shaft_rpm")
self.connect("torq_deflection", "generator.y_sh")
self.connect("torq_rotation", "generator.theta_sh")
self.connect("stator_deflection", "generator.y_bd")
self.connect("stator_rotation", "generator.theta_bd")
self.linear_solver = lbgs = om.LinearBlockGS()
self.nonlinear_solver = nlbgs = om.NonlinearBlockGS()
nlbgs.options["maxiter"] = 3
nlbgs.options["atol"] = nlbgs.options["atol"] = 1e-2
nlbgs.options["iprint"] = 0
else:
self.connect("hss_rpm", "generator.shaft_rpm")